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Kingsdown vs. Serta

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Kingsdown

Kingsdown has been creating luxury style mattresses since 1904. Their mattresses are often seen in home stores and mattress retailers, and are even sold online at popular online merchants. Kingsdown offers a variety of different mattress types including foam, latex, pocket coil hybrid, and even an adjustable air mattress. Many customers like their Kingsdown mattress at first, but there are some complaints about durability issues over a shorter duration than expected.

Serta

Serta offers foam and coil mattresses and are common at many mattress stores and big box retail locations. As a household name in the mattress industry, Serta has been in the mattress business for a long time. Their mattresses range from budget-friendly to higher in price and offer a variety of firmness options and cooling designs. While most customers find Serta's branded products to be initially comfortable, there are some concerns about durability for some sleepers.

Based on our aggregated reviews and our scoring method, we recommend both Kingsdown and Serta Perfect Sleeper in this match up!

See Our Top Mattress Choices

Mattress Score

Overall Score:
Kingsdown: 7.2/10
Serta Perfect Sleeper: 7.2/10

Customer Satisfaction:
Kingsdown: 7.2/10
Serta Perfect Sleeper: 7.2/10

Price Value:
Kingsdown: 7/10
Serta Perfect Sleeper: 7.1/10

No Back Pain:
Kingsdown: 7.5/10
Serta Perfect Sleeper: 8.2/10

Price:
Kingsdown: $549-$7099+
Serta Perfect Sleeper: $349-$4599

Kingsdown:
Get Yours Now

Serta Perfect Sleeper:
Get Yours Now


Kingsdown's Owner Satisfaction

Sleeper reviews can be hard to understand from a high level -- especially with all of the marketing being done by companies and retailers. These mattresses, sadly, don't get the highest reception from sleepers. There are still folks that are content, but others who are really not. Make sure to read on to figure out if they will work for you.


Kingsdown's Supportiveness

Support is extremely important for the comfort of a night's sleep. These mattresses are generally rated well at the beginning, but some folks had complaints about the supportiveness over a long duration. This is one reason to really do your research to make sure that these mattresses will fit your body type.

Edge Support
Most reviewers find edge support to be a differentiator of leading mattresses. These mattresses have okay edge support for most sleepers, but some may experience dips.

Bowling Ball & Density Tests
In bowling ball tests that measure the supportiveness of a new mattress, there is initial support throughout the mattress is fairly even for most sleepers. However, there are some folks that have experienced issues with support over time.


Kingsdown's Durability

Having a mattress that lasts is one of the most important factors to sleepers. We all wish our mattress will last a decade or more and still provide us with cozy comfort. However, these mattresses are not rated well by some reviewers on durability and some have experienced breakdown after only a short time. If you are considering purchasing as your full time mattress, read the reviews to make sure it will work with your body before buying.

Serta's Owner Satisfaction

Customers don't always feel good about these mattresses. Some sleepers were unhappy with the comfort, but others were really pleased. One of these mattresses may be great for you, but it makes it harder to predict. Look on below to see if one of these may work for you.


Serta's Supportiveness

Some of the customers don't feel that the mattresses support them well enough. Though many find these mattresses comfy initially, if you have a heavier body type, make sure to do more research before purchasing.

Edge Support
For those that are hoping for impressive edge support, some report that these mattresses don't have the best edge support.


Serta's Durability

These mattresses may not be as long-living as you'd like. Some sleepers have had problems with feel and durability over a shorter than average time. If you are larger or are looking for something supportive, you may experience good comfort initially, but make sure to brush up on the warranty and return policy before buying.

Browse Kingsdown Customer Reviews

I got my Kingsdown mattress about 6 months ago...
I got my Kingsdown mattress about 6 months ago. It is without a doubt the best bed I have ever had in my life. I went out to find the feel that you get in the Ritz Carlton and the Four Seasons. You know, really supportive but PLUSH-PLUSH-PLUSH. I use my mattress on a powerbase that I had already, and it is so wonderful that I don't want to ever get out of bed. I feel perfectly supported, but there is no pressure anywhere on my body. It was a little pricy (almost 3000) but it was SOOOOOooooooo worth it. I got it through a Mattress Giant locally and they were a pleasure to deal with as well. I hope I never have to sleep on anything but Kingsdown for as long as I live.

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I've had my Kingsdown mattress for 14 months...
I've had my Kingsdown mattress for 14 months. It sags in the middle so badly that it causes me back pain. I'm very disappointed. I've had several Kingsdown mattresses before and was alway satisfied. Not any more.

We literally tried everyone else. This is an amazing bed.
We went through four different mattresses, and actually returned a discontinued Kingsdown mattress before getting this mattress as a replacement. Although we did not buy through Amazon (did not know at the time we could), this mattress is amazing. We tried the top of the line "number" bed, sent it back. Top of the line (and I mean expensive) memory foam number bed, and sent it back. Tried another Kingstown mattress that we still didn't like, and they talked us into this mattress....and I am so happy they did. We have had this mattress for over a year, and there are still days my wife and I wake up and say "holy cow I love this bed." I wanted to pass along this review, because we searched for a bed that wouldn't leave us with aches for two long, long years, and since the customer service was so good, I wanted to pass this along to other people.

It is fantastic! Everyone who sleeps on it comments about how ...
We purchased this mattress a few months ago for our guest room. It is fantastic! Everyone who sleeps on it comments about how comfortable it is. It provides plenty of support with a cushiony layer on top. Now we're planning to purchase the same mattress for our master bedroom. One caution: this mattress is very deep so a low-profile box spring is a must.

We really like that this bed is firm
We tried this bed in stores before purchasing on amazon, it was slightly cheaper here. My husband and I had a sleep number for 5 years before deciding to try something new. We really like that this bed is firm, but has cushion pillow top as well. We've been sleeping on this bed for a few weeks now, and its fantastic. I am pregnant, so sleeping is not the easiest thing for me anymore.

I purchased an 800 series...
I purchased an 800 series top of the line mattress in 2010, and after 8 years one side started to sag, I called and they sent out a mattress marshal to examine and do his measurements. After a week I received a letter stating that the sag is more the normal but they are going to void the warranty because there is a small stain on the other side of the mattress, stating in the letter that is the cause of the sagging. That is bunch of lies they just don't want to stand by their warranty, please stay far away from this company. When I purchased this mattress nowhere stated that any stain will void a warranty, I really took good care of this mattress, I even have two sheets that cover the unit. So this is definitely a defect that they have recognized but getting away with not replacing it. I wish there was no star, they don't deserve even one.

My personal experience was fantastic
My personal experience was fantastic. We co-own a little hotel at the beach and bought a dozen Kingsdown bed sets in 1997. We are only NOW having to replace them, nearly 20 years and these were used most every night! We bought the higher end units and that quality difference is really obvious - you get what you pay for. That's why we got a dozen more to take us into retirement last summer - and a decent deal too. It doesn't hurt that many of our Booking.com reviews talk about the comfortable beds

I thought I had found the perfect mattress
I thought I had found the perfect mattress in 10-14 and was happy with it until 3 months ago the side wall of the mattress came apart from the rest of it. Kingsdown did send out an independent person to look at it, he agreed with me (at the time he was in my house, evidently he just wanted to appease me) that the mattress had broke down. However he didn't relay that information to Kingsdown and they deemed the problem normal sagging. And because it had a small stain on the opposite side the warranty was voided, not sure why they bothered to send anyone. It was a waste of time. I actually contacted them because I thought they would want to know the mattress was defective. It had nothing to do with sagging, 3/4ths of the mattress is ok, but you will roll off the side if you aren't careful.....BAD construction and a waste of my money. Never buy a Kingsdowns!

buyer beware!
buyer beware! stay away from this company! shop somewhere else! i purchased a kingsdown high end mattress and box spring set from se and after 3 years they started breaking down. after sending a third party furniture co. for inspection that determined that the box springs were truly defective and made the worst noise he ever heard when he turned in his report kingsdown weaseled out of their warranty because they said i had not used a center support. even the tech said they will find any avenue they can to "void the warranty" like if the tag is missing, any stain, etc... i tried to work with them to back their product but they chose profits over customer satisfaction. highly unsatisfied customer. i will never buy from sleep experts again or a kingsdown product. truly a pos! if I could give them a rating less than 1 star I would. read the other reviews! they are exactly right in what they write. kingsdown is a sham of a company and a pathetic excuse. junk, junk, junk, junk, etc...

The only reason they are getting one star
The only reason they are getting one star is because I couldn't rate zero or negative stars...Two years ago I purchased a top of the line pillow top Kingsdown mattress from a local Sleepys in my area. I had previously owned a Kingsdown mattress for approximately 12 years and it was fabulous which prompted me to purchase another. Two years later I am unable to get out of bed without grabbing the edge of the bed and pulling myself out of a sinkhole in the middle. I called the company and they sent someone out to take pictures and measurements and have just informed me that a normal amount of "sinking" has occurred and they are denying my claim. So let's reiterate...they think it's perfectly okay to spend $2,500 on a mattress and in two years have to pull yourself out of a hole??? They are appalling...I don't think it's normal to spend my hard earned money on a crappy mattress that the don't even stand behind. By the way I've since went on line and have read that this is a common problem with their mattresses. My advice? Forget they exist because with this level of "customer service" they'll be out of business in no time.

Received a defective mattress
Received a defective mattress and we can not get kingsdown to honor their warranty. Stuck with a $3,500 mattress that sags more than our 10 year old mattress that we replaced.

Worst Ever!
You would think that after 3 years, this bed would still be usable. But now there is a big canyon in the middle of it. They sent an inspector who also agreed verbally. But then after (mind you this is months of calling) we received a letter from them saying that they wouldn't honor the warranty. Scam.

Super hot
I can barely sleep at night on this mattress. I think the top just sucks in the heat and keeps it there. Very disappointed.

Doesn't Last
Bed was super saggy after 4 years and so I had to get a new bed. Not worth the high price tag when you can get a saggy bed after 4 years from anyone else.

Replaced Twice in One Year??
Luckily I was able to get an exchange, which reading the other reviews seems like a shock. After only 3 months, I had sagging and the inspector who was sent out agreed so I got a new bed. Well, a couple months later, more sagging. The only reason I am adding a star is because they at least sent us a new one.

So Uncomfortable
We thought it would be the answer to our problems, but after only 3 years we have a mountain in the middle of the bed.

Lumpy and Saggy After 3 Months
I sink into this mattress and I am not that big of a person. It causes extra back and hip pain because it is too soft and lumpy.

Mattress Defect
We bought a Kingsdown MYSIDE mattress with a latex top at WGR in Green Bay WI. It was a floor model. Within 2 years the Latex top ripped and split on the inside and Kingsdown would not stand by their product because in was a floor model. We loved the mattress so much I tried repairing it myself 5 times until it just would not hold. It is too bad. They make a quality product, but would not stand by it. MY wife's side has held up beautifully. My side was clearly a defect in the latex.

Poor quality and warranty
DO NOT BUY a Kingsdown Mattress!!! I purchased a new Kingsdown King size mattress in June 2018. Within months of owning the bed it began to sag and created a hump in the middle. After contacting Kingsdown for the warranty, they sent out a third party inspector who indicated the mattress had a 2” dip on the right side. Kingsdown denied my warranty claim stating it was within normal wear measurements. Now, if anyone else is considering spending over $1,500 on a mattress, I’m sure you’d like to ensure you have a product that lasts for more than a few months and the warranty is valid. Nice job Kingsdown you lost another customer!!!

Pilling.
When we removed the (overpriced) mattress cover which seller (Art Van - maybe there’s the answer- they buy “seconds” with minor or “invisible” defects to sell so cheap) insisted we needed to buy to not void warranty, there was pilling on the surface, which was a “stained” tan color! Looked like “bugs”, but they are just fiber balls that stuck to “fuzzy” surface of mattress (like “pilling” on a sweater) and have to be picked off by hand!

I DO NOT recommend to buy a mattress here
just now-Edit My Fiance bought a bed on Aug 07, 2018 with warranty. It wasn't even a yr when we started to feel it sink in really bad and be very uncomfortable to sleep in, so we contacted Teppermans. They sent a man out to run some test on the bed to say that the bed has a visual drop of only .5" which is standard to the amount of time we had the bed. which made no sense because when we laid on it, it sunk in a lot more than that making it very uncomfortable. They contacted me to tell me they are not able to do anything about it and referred me to contact the manufacturer "kingsdown". Which I did, they responded with the same response that our "warranty" is not valid due to not meeting the guidelines on have a drop of 1.5". So basically we are stuck with a $1500 mattress that sucks along with the warranty (which is pointless). I am currently pregnant suffering from major back problems due to this sinking bed that is only a little over 1yr old. Therefore I DO NOT recommend to buy a mattress here due to my experience and seeing it took about 4 months to get a final response which wouldn't have happened if i didn't call back several of times.

Poor Quality, Terrible Customer Service
I would like to submit a review of Kingsdown's customer service and warranty promise. I would never buy another product from them. Long story short: Their product failed (Hudson firm mattress, $1600) sagging after 3 years. They would not honour their warranty because the mattress was bought at Sears..(because Sears is out of business they can't confirm the purchase... ?????). Not only is their product inferior..... they demonstrated terrible business practice.

Best Ever
Absolutely the best mattress we have ever owned! We even bought one for our guest bedroom. Love them!

Worst Mattress Ever!!!
We purchased a Series 4.0 QLPSF top of the line model from Art Van Pure Sleep. It was customized for my weight (6' 185 lbs) on one side, my wife's (5'6" 125 lbs) on the other. The mattress was only comfortable (but not awesome considering the $3000+ price tag) for the first several months and a year and half later, there's a crater -- and yes, I mean crater -- in the middle. Excessive sag is putting it lightly. My wife and I sink to the point that we are touching and are both experiencing consistent lower back pain with no suitable sleep position. The warranty only covers replacement and at this point I would not wish a Kingsdown mattress on my worst enemy, and Art Van has filed for bankruptcy. Worst major purchase I've ever made. Live and learn...do not make my mistake!

Best mattress ever
We purchased 2 Kingsdown mattresses in 2009 to improve sleep and make the guest bedroom a place where family and friends wouldn't want to leave. Eleven years later we do believe now is the time to purchase a new mattress. I am reluctant to spend the 3 months scouring from mattress dealer to mattress dealer knowing that everyone who slept in our guest stated that that bed was the most comfortable they had ever felt. Most reported the best night sleep.

adkinson kingsdown not worth the money
good at first but box springs are weak the metal bends and mattress rolls you off .couldn't get any one to come out and evaluate so i had to do it my self took for ever to hear a responce then they only want to replace mattress for $350. not worth it. would not recomend this to any one

Poor Durabiity.
I got my Kingsdown mattress about 7 years ago. A the start it was great but withing 4 years it developed a problem with a depression forming in the bed. Now 7 years in it's terrible and to the pint i need to get a new mattress soon. Given the very high cost of this mattress I'm very disappointed it only lasted for a short while. I believe the warrenty is only for 5 years - so this all makes me very sad.

Kingsdown 300 series Great for first 5 years
My review is very simple. We had a Mattress with a 20 year full warranty. The mattress started failing around year 6 but it wasn't until year 9 before it was bad enough for them to warranty. Think about that... if I bought a new car with a 7 year 70,000 mile warranty that would just lose power every once in a while and they tell you when it won't restart we'll take a look but if there's a coffee stain on the passenger seat we void your warranty.

They don’t honor there warranty
Don’t Buy these mattresses they are cheaply made .mine wasn’t even 2 years old and now I’m having problems with it.they said I have a 10 year warranty and they aren’t honoring it.

Dipper
We have had two Kingsdown beds (the second under warranty from the first) they have both dipped more than the warranty specified 1.5". They have now both been replaced under warranty. My wife and I are in our 50's and of normal weight so there are no reasons for the failure other than the materials or manufacturing. There have been no arguments with warranty replacement but not an experience we should have to undergo every 3-5 years. So I won't be accepting another replacement from them I will go elsewhere with the credit

yes
Very comfortable. Could be a little firmer.

Comfy, high off ground
Super comfy my parents love it, you may need a foot stool to get in the bed once you add the box spring because it’s a little high

Hip pain gone!
Had back and hip pain before moving to KD Courtney Plush Hybrid mattress. Within a couple of nights the pain was gone. Full night's sleep as well. The exchange from previous mattress we purchased to this mattress was seamless and professionally handled. Richard at the West Broad Street store was exceptional. His knowledge, patience and professionalism were spot on.

Money well spent.
Rather firm matters for my taste, but is clearly well constructed. Worth the money for sure. Delivery was super nice as well. They hauled it upstairs for us on arrival. Solid purchase.

I would buy this mattress again
Absolutely worth the money wake up every morning

Nice and firm but soft enough
My family and I love Kingsdown. They’re always a good brand. I got the more firm version as it helps alleviate any lower back pain. Overall, I love it.

Maybe
It's ok, my son likes this mattress

Amazing sleep!
Amazing!!! Doug was a huge help. We love our Kingsdown!!!

Customer service was great we'll buy again
Was unsure at first if the mattress was going to feel as good as it did in the store. I have back pain. I'm too 220 lb with a lot of backside. It is often that I have back pains. Slept on the mattress the first night. Woke up the next morning thanking God. No back pain. Mattress is worth the money will buy again.

Too firm and lumpy
This mattress was soft and comfortable in the store. The one we received was lumpy in the middle and significantly firmer than the one we tried on the floor. Awaiting to start the 30 day comfort gaureentee. Hoping our next experience is better.

Browse Serta Customer Reviews

Really nice when warm. Hard as a brick when cold.
Have a cabin where the bed room temp is around 60 in the winter. The upper 3 inches of gel memory foam is really ridgid when cold. Climb into a cold bed is more like climbing onto a piece of plywood. After about 10 minutes, your body temp softens the foam and it is really comfortable... until you roll over too far onto a cold slab and you are back on the plywood.

I sure hope summer is more comfy.

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The Best Mattress!
This is a great mattress! My husband and I moved to our new house and bought this mattress for our room. The first bed that came did not open up all the way and was basically a taco. We called Amazon and they sent a replacement. We have been sleeping on this bed for about 3 months now and we can feel the difference from the traditional mattress we had prior. Our sleep is a lot better, we no longer feel sore, and we don't notice each other's movement during the night. Definitely get this mattress!

Firm enough for a big man like me!
I weigh a lot in comparison to other people so I was initially hesitant to buy a memory foam mattress as I feared sinking to the bottom or drowning. This mattress not only held my weight stiffly but it is super comfortable and probably the best mattress I have ever used. I bought the double and it worked so well that when I bought a king bedroom set I decided to buy the bigger exact same mattress in king size. It come in a big box compressed so you will want to get it upstairs on the bedframe before you open it up and let it absorb all the air around.

Great Buy!
I was uncertain about purchasing a mattress on-line, but the price was so much below what I found in stores that I went ahead and made the purchase. I'm glad I did. The shipping was easy, the mattress quickly expanded once in place. I did not notice any odor. I'm sleeping much better through the night and wake with less back/hip pain. This mattress is a great buy, especially for the price!

Amazing
My wife and I were looking to upgrade our bed to a king during a recent move. We looked at all the big named stores for furniture / mattress and were taken back by the price of the memory foam mattress. We tried out the I-comfort mattress Raymour and Flanagan's and really liked it. After spending hours researching this mattress, I came to the conclusion that this is similar to the Serta I-comfort and about 1/4 - 1/3 of the price. This bed is exactly as advertised and feels identical the the I-comfort we tried in the store. We could not be happier and it sleeps so much better than a traditional spring mattress. I would recommend to anyone.

Remember, you also need a box spring or foundation. This will add another $200 - $400 for the total cost of the bed.

A most fantastic mattress
Our new mattress is comfortable beyond words and so much lighter than the Tempurapedic we had before for many years. It feels like a heavenly cloud and we have slept so well on it and could not be more pleased with our purchase. The price of it is unbelievably low, I recall we paid $2,000.00 for our old mattress over 15 years ago.

Maria & Ted Phillips

I snore less.
One of the best beds I have slept on. I usually sleep HOT and was leary of trying the memory foam bed, but i was amazed at how cool it sleeps. My wife has also said that I do not snore as much.
I could not give the bed a 5 for one reason. I like to sit on the edge of the bed and put on my shoes, but this bed does not have the support on the edges to do that.

Hard, hot, and bumpy
I've had this mattress for 3 weeks now and I am not happy. It is very firm for a memory foam mattress (maybe it will soften up over time), so firm that my body doesn't sink far enough to fill in the lumbar space of my back. I wake up sore every morning, and it reminds me of sleeping on the ground (I camp a lot, so I know). It was shipped in a shrink wrapped container, folded in half, so there is still a noticeable ridge down the center of the bed that divides the two halves. Also, even after airing it out for a week, it does still have a noticeable plastic smell. Lastly, it does trap a heat a little bit.

Overall, I am really unsatisfied, and am contemplating returning it.

Very good mattress
I have had this mattress for a year. The mattress is very good. I read a ton of reviews before purchasing this mattress. A lot of mixed reviews when I researched this mattress. I could not see spending 1500 to 3000 dollars for a similar mattress. I was a little skeptical because this mattress was so cheap. Amazon Prime was a factor in purchasing this mattress. The mattress is very good. No issues with smell or sagging. I am very happy

Hard as a rock
Wow, what a disappointment. Sure wish I'd listened to the reviews that said this mattress was HARD. It's not just firm, it's like sleeping on a stone slab. I can't imagine the hassle to pack it up to return it, so after a week of suffering, we bought a 4-inch memory foam topper, which has helped tremendously. However, as soon as we can afford it, we're buying a real memory foam mattress.

Way to firm for Foam!!
If I had it to do all over again I wouldn't have bought this. It needs to be listed as an Firm mattress. Since I have it, I tolerate it. I went out and bought a 1inch foam topper to put on it to reduce the firmness. What I do find is as you sleep on it and it warms up it gets softer. So I bought a heated mattress pad and put it on also. About an hour before bed time I turn it on low and it does soften the mattress somewhat. Over all I would never recommend this mattress nor would I by it if I knew what I know about it now.

Great Sleep
We were a little worried to buy the bed online, but took the plunge. We were pleasantly surprise at how quick it was delivered. The queen size bed was heavy, but being boxed up made it easier to move. Once in the bed room, we unpacked it and let it return to its original shape. About two hours. The bed sleeps great. My wife and I both enjoy the fact that it adjust to our size. It does not wiggle when I get out of bed at night. I was expecting to sleep hot, but the cool gel works. Great purchase and great value. We priced similar beds at retail stores and they cost $1200. Very happy.

I love this mattress
I bought this mattress almost 2 years ago and I still love it.

That being said, I must disclose that I am somewhat cold-natured, so I don't mind that it retains heat, as the new memory foam mattresses do. This is the only reason this mattress gets 4 stars instead of 5.

When I purchased this mattress, I had done quite a bit of research on prices and quality of memory foam mattresses, and found this one to be one of the most economic choices for the quality. I am happy that I chose this one.

It arrived in a big square box. WARNING: Do NOT open the box until after you drag it upstairs and into the room where you want to use it. Opening the box in another room will create a lot of unnecessary work for you.

The instructions said it would take about 24 hours to completely assume its proper shape and size. In reality, it was ready just a few hours later.

My husband complained that it was not as soft as he liked, so we bought a memory foam/gel mattress cover for it at Costco. This helped make it softer and provided some relief for my husband from the heat retention.

If I had to buy another mattress, I would buy this one again.

Smart buy
The full size mattress is really comfortable. Bigger then a normal full size mattress. We had to replace the old boxspring to a sleep master smart base because of the size if the new Serta. Now we have more room under the bed for storage as well.

Great for sleeping, but quality a bit poor.
I was already to give this a 5 star rating. We bought it in june for our summer place. We have a temperpedic and home and never sleep well with out it. We could not justify the cost to buy one for the summer place. When we found this we were excited! The negative reviews sounded like the negative reviews for temper pedic, so we were not too worried. The box made it really easy to transport ourselves to our place. It opened and inflated great! We had all the windows open and fans going, but we never really noticed an odor. We even slept on it the first night!. It was close to the temper pedic sleep wise. Not quite as cloud like, a little harder, but it worked for us!

This weekend, I took off the waterproof cover that we purchased to wash it with the sheets. I found 4 places on the mattress where the seams were split and you could see the foam inside. Very dissapointing! We expected a little more from a Serta!

Love this mattress
Excellent mattress through and throughout..Amazon was super quick and mattress was in perfect shape..As I sleep on this mattress 2 yrs later all I can say is I sleep like a baby..It feels like you're sleeping on a cloud ..I wake up refreshed from a great night sleep day in and day out..

I'm lovin' it!
Researched loads of beds in my desperate attempt to get a good nights sleep and deep six the pillow top that was aggravating my already ailing lower back...........decided on the Serta icomfort since many people commented on how hot the memory foam gets.....and tried it out at my local store where they were upwards of $1600 depending on the depth. Arrived promptly, NO SMELL, easy set up and was sleeping in it that night....however my husbands initial comment before he had slept on it, was that it was like a slab of concrete.......... but once you're in it this is not the case... It is firm, yet neither too firm nor too soft and extremely comfortable altho it did take me 3-4 nights to get used to it having been sleeping on a pillow top, and I did find I had to adjust my mediflow pillow somewhat so it was flatter and lower...........the only down side I can see, is that both myself and my husband have been lingering in bed much later than normal, I used to be up at the crack of dawn since my back would be complaining and I needed to get up, but its oh so comfortable, and I'm loathe to get up when its so very snuggly and cosy....I'm sleeping much better with less tossing and turning due to pressure points.... if you're considering one, I'd say go for it, we both love it and were not dissapointed in any way!
**UPDATE** Oct. 2014 No sagging....best bed EVER!

Serta 12-Inch Gel Foam 3-Layer King Mattress
We received this mattress packed in its box and we took it to the bed and unboxed it accordingly to the instructions. Here is a short video of the process. [...] We then waited only a few hours, made the bed, and slept that night on it. Its been great this first week! Highly recommended and I will write another review after a few more weeks along with an updated video of it. It was awesome to see it take its shape! Thanks

Intelwalk

Great mattress. Unbeatable price.
Bought this mattress after trying out several different foam beds at various stores. Macy's had the Serta line of beds and I liked them much more than the others that were there. So I was very pleased to find the mattress on here.

I bought the full sized bed and it came in a box that's roughly 4' by 2' by 2'. The factory folds the mattress several times and then compresses it in a plastic wrapper. I put it on my existing box spring and opened it up and left it sit for about 6 hours for it to reach its full shape.

There was a slight smell to it but nothing unpleasant and by the time I put the mattress pad and sheets on it, I was sleeping on it the first night without any issue.

If this is your first foam bed it will take a few nights to a week to fully acclimate to the difference between this and a spring based bed, so dont give up on it too quickly.

I sleep on my back and side a lot and used to have horrible shoulder and hip pain from a conventional mattress and the pressure points. I am pleased to say this is entirely gone with this mattress.

I normally like a very soft squishy mattress and when you first sit or lay on this bed (especially if it's a bit cold) it's very firm. I laid on it and thought, "this will never work". Then it begins to conform to your body and supports you so well, you'll understand why so many people are switching to this type of bed.

With any foam bed, they hold a little more heat than a normal mattress. I havent had an issue with this one other than during the colder months I had to turn my electric blanket down than where it's normally set and I am fine. I would HIGHLY recommend this bed and at this price you just cant beat it.

Best mattress I have owned
I have had this mattress for over 3 years now and it is just like new. Would highly recommend if you are looking for a quality memory foam mattress at a great price. I have back problems and this has been wonderful.

This is a great mattress!
I was very skeptical when I ordered the product, and when the mattress was delivered in a 3 ft box and I pulled out the mattress folded over and shrink wrapped, I became even more anxious. When you first open the mattress and flatten it out, it will be hard as a rock. This is only because the gel becomes cold and needs time to reach room temperature. I let my mattress straighten out for around 5 hours, and by that time the mattress was completely flat and much softer. I wish the mattress was a little firmer, but all in all I am very happy with my purchase. The mattress is extremely comfortable and I love that the mattress retains my body heat, especially during the winter. If you're looking for a comfortable mattress at an affordable price, I highly recommend this mattress.

So far so good
You have to let this bed have a break in period. It was shipped in a little box and expanded very quickly. My husband built a platform out of wood for the bed. The product only had a smell for the first night or two but nothing like some of the reviews had mentioned. Now it did have a high spot for the first two weeks but after it began to break in things got better. I waited to review this poduct because I heard that these type of beds need to be broken in before you can have a real good nights sleep. We are both sleeping better. I love it even more because my husband wakes up earlier than me and I never ever feel him moving or getting up before me. I love that part. This was a good buy. I didn't give it a five becuse I am a hard grader.

Just Right
I ordered this bed in the offset chance that it would be comparable to the beds in the big chains (i.e. Macy's, Sears, Etc.). I was pleasantly surprised when it arrive on schedule and was set up and ready in minutes. There was no smell that a lot of other customers spoke of. It did have a slight crease for the first few days. However it has fallen and I assumed it was due to packing. I've only spent two nights on it as I'm not moved in yet, but it made for a comfortable sleep. Especially with my girlfriend. Having my arm under her pillow didn't come accompanied with the "dead arm" that happens on most mattresses. All in all it was a good experience and saved a new home owner a lot of money. Thanks!!

Just like the more expensive mattresses
We went to a department store to try out memory foam mattresses and got sticker shoch at the prices. We came home found this Serta on Amazon we ordered it right away. When it arrived we were very surprised to find that it feels like a nuch more expensive mattress. We are very happy with purchase of this mattress. Thanks so very much.

I am in love with my new mattress
I am in love with my new mattress. It's a whole lot firmer than my old one, but a whole lot more comfortable. I had the luxury of testing it at my parent's home first. I have already recommended it several times.

I like it, wife hates it
I purchased this mattress 6 months ago after trying out the Gel mattress in a local store. This mattress doesn't seem as soft as the one in the store. My wife liked it at first, but after a few weeks changed her mind. She now says it is the hardest mattress she has ever slept on, but she seems to sleep well. I have back problems, and I do think the mattress is hard but I also think it helps my back. The gel does help keep you cool, but the foam mattress does hold some heat.

Amazing mattress!
Greatest mattress I've ever slept on. I am about 205 lb and it hasn't had the denting problem other foam mattress suffer from even after a year of use. The gel also helps to keep it nice and cool during the summer months.

Also, there was no noticible smell when I opened it.

Love it!
I had read a lot of reviews before purchasing this mattress and I am so glad I did. It does take two people to set this mattress up, but easy to place, remove the package, and let it sit to expand. There was a slight odor of chemical, but it wasn't that bad. I opened the sliding door to let natural air in and seemed to be kind of gone by the evening. The bed was comfortable, firm, and felt very relaxed as soon as I laid in it. This was definitely a good purchase for the price!

For a great night's sleep.
This mattress is very comfortable - no pain from pressure points. It is quite firm but we use a fluffy mattress pad which makes it just right for us. The mattress is barely a month old but so far, we love it.

Amazon told me to wait and now i can't return this item.....NICE!!!!!!!
I purchased this bed and the first one came to me falling apart... The replacement one seemed to be ok... we set up the bed and it seemed to take it shape over the next 24 to 48 hours... it had a very high spot in the center on the fold that they put in it to box this item.... the high spot never went away... i spoke with a amazon rep. and the said that it should relax and lay flat... it has been almost a year am I'm still waiting for it to lay flat...i have to lay in the middle of the bed to cuddle with the wife!!! this don't make me happy... so it looks like I have to spend more money and get a new one...i just spoke with a Amazon rep. and he told me that the return window was only a few weeks from purchase... so i waited as asked and now i can't return this item...I to me seems like i was told to wait so that they didn't have to return this item!!!!! Amazon is usually good with things like this but per there request that i wait i loose out??? this just don't seem right in my eyes... i guess I'm out the 581.94 that i paid... YOU HAVE BEEN WARNED DON'T BUY!!!!!!

Gimmick product, period
I bought this in hopes of finally getting good night's sleep on a comfortable mattress. That didn't/hasn't happened. Hands down the dumbest purchased I've made off Amazon ever. This thing is HORRIBLE.
Main complaints:
*Stiff as a board.. No matter the temperature (they claim your body temperature will fix it as it heats up)
*Stinks of chemicals. Not sure what its made out of but WOW! Smells like I'm sleeping in an open can of paint.
*I weigh around 190lbs and I don't even make a dent in this thing. I don't sink in and it sure doesn't "form" around me.

Talking to a retail seller of these he told me more foam mattresses are returned than kept. The floor models are beat down versions of the real things so people can't feel the stiffness.

Gimmick product, period

Good company bad product.
This company is good but the mattress sucks. The first one we got we thought there was a defect because where we sleep there are large indentions but since they replace the mattress the same thing is happening .

If you buy this, don't plan on staying out of it for long.
If you buy this, don't plan on staying out of it for long. This mattress is so deliciously cozy that after the first night, I ordered one for my daughter as a birthday gift. No more legs cramps, neck pain from sleeping in the wrong position and the mattress doesn't heat up like the regular memory foam beds. SOOOO nice!

SERTA DOES NOT MAKE THIS MATTRESS. WARRANTY IS THROUGH OTHER MANUFACTURER. READ ISSUES BELOW
We purchased on 10/30/2011 and keep a protective mattress pad/cover and deep pocket fitted sheet on at all times. We paid $583 for a queen back them. We have just reported issues to Serta, who told us Sleep Innovations makes the mattress for them. Sleep Innovations are now Innocor Comfort out of New Jersey. We have to deal with them and not Serta. Wish I would of known that back then. The issues we are having is that the Gel Foam has shrunk 1.5 inches on the foot of the mattress and 1 inch on the one side, across the entire width and length of the mattress. In addition, the seams are coming apart and separating on the top of the mattress cover. Innocor emailed me a form to fill out and I have to send them a copy of the Amazon receipt and photos of the issues. We will see how the warranty comes into play and if they make good on a replacement or refund. Will keep everyone updated.

Not Bad for a Serta-ish Mattress
We had a spring mattress that was causing back problems, went to 100 stores and looked at the memory foam options, then decided to buy this one because it was less than half the price. The one caveat is - the mattress says it's Serta but it's not really. It's made by Sleep Innovations (who is not Serta). We talked to support about it when all the docs showed up in a Serta envelope but were labeled as Sleep Innovations and they seemed confused about it as well. Then we called Serta to ask about it and they said they sold the rights to Sleep Innovations to make the mattress and use their logo to help sell it. All very confusing and more complex than it needs to be - but at the end of the day, we like the mattress so far and it wasn't outrageously expensive. Now onto the actual mattress...

It's definitely pretty firm. I think we've had it long enough now that it's officially "broken in". We did add a topper to it to make it more comfortable. If you have a low bed platform, you'll probably want to buy a solid riser (unless you like doing an ab workout to get in an out of bed). So far, I'd say worth the money. Will come back and re-update in a few months.

4 years later and it's still wonderful
I waited to write a review ... and then I forgot about it. I bought the mattress in 2012 and today in 2016 it doesn't have dips or depressions where we sleep and is wonderfully comfortable. There are two things to consider about foam mattresses and it's a little confusing. 1) FIRMNESS - This is is ability of the mattress to support you body without sagging or forming depressions. This has to do with the density of the foam. That's why some reviewers talk about how heavy this mattress is - it's because it's so firm - and that's a good thing. It's why 4 years later the foam is still in good shape. 2) SOFTNESS - This is the Pillow Effect on the top of mattress that gives you comfort. This mattress is very Firm but not Soft on top. And that makes it feel a little "rock like" to some. If you like a lightly pillowed top I HIGHLY recommend a 2.5 inch gel mattress topper. (The one Costco sells is perfect). I know it seems like the whole mattress is now more expensive but too many other less expensive mattresses sag (are not firm enough) to hold up over the years, and that's false economy. Also trying to dispose of a heavy foam mattress is not fun. My husband and I think this mattress is wonderful.

Firm. Supportive. Not Plush.
We have been sleeping on foam mattresses for a long time and will never go back to springs. This mattress in particular has excellent support characteristics but if you are looking for a "plush" feel, you will need a topper. This is a firm mattress which supports the body. It is not a mattress you sink into like a cloud. Some will equate that firmness with being an uncomfortable mattress but really it is just for people who prefer firmness to plushness. Before you buy this one online, you should go to your local mattress store and ask to try their most firm mattress. You must lay on a foam mattress for more than a few seconds to give it time to adjust to your body. If the firm feels right, this will suit your needs. If you need plushness, keep shopping.

On a side note, another advantage to a foam mattress of this thickness is that you do not need a box spring. Whatever you put this on will be fine for a bed which means you can make a pretty cool artistic platform beds, or set it on a board or cinder blocks or whatever and as long as there is a flat surface directly under the mattress, the feel will be the same as if you used expensive box springs.

not for us
This gel foam mattress was really hard for me. I was 9 months pregnant when we got this mattress and I thought it would be good because it can help me get a good nigh rest by having a good support. Nope. I was wrong. It felt like I was sleeping on the floor. Every time I move it hurts. Plus it wasn't comfortable because it was hot. Don't know why since it's suppose to have a gel foam but I guess that doesn't work for me. If you prefer plush mattresses, this is not for you.

Comfortable
I've purchase memory foam toppers in the past and wound up very unhappy with them. I would sink in too much and wake up throughout the night just to turn over. I've had no problems with this and now realize there is a HUGE difference between toppers and a real memory foam mattress.

First off, this thing weighs a lot, nearly 100 lbs. If you don't have a strong man to help you with this, you will have trouble. UPS had to help me in the door with it on a dolly. It arrives in a box, contorted and airtight sealed. Unpacking was a two man job and we unpacked it right on the frame.

This mattress does not sink much when you lay on it and reminds me very much of quality mattresses of years past (prior to pillowtop.) No achy back from this mattress! The hardest thing we had was finding a proper platform for it. Wound up going with the Structures by Malouf HIGHRISE Folding Metal Bed Frame 14" High Bi-Fold Platform Bed Base, KING and didn't even need plywood or anything. We put the mattress straight onto it and this was an affordable option over a platform.

I will need a new twin mattress soon and I will definitely be getting one of these mattresses for that bed.

****UPDATE: Aug 14, 2012****
I now own two of these. After having owned the first one for quite a while, I felt the need to come back and clarify something.
Foam mattresses and toppers are hot to sleep on. I thought everyone knew this, but since they don't, I needed to let them know. If you are prone to being cold, you will like this mattress. If you are prone to being hot, you will hate this mattress and definitely wake up sweating.

GREAT MATTRESS
COULDN'T BE HAPPIER. I AM A SENIOR WITH SEVERAL ORTHOPEDIC ISSUES. BECAUSE OF PAIN IN MY HIP I WAS HAVING TO SLEEP ON THE COUCH, WHERE THE DEPRESSIONS BETWEEN SEAT CUSHIONS FIT MY CURVES. NOW I CAN SLEEP IN BED AND MY HIP DOES NOT HURT. I HAVN'T BEEN ABLE TO SAY THAT FOR 2 YEARS. SHOULDER PAIN ON THE SAME SIDE DID NOT RESPOND AS WELL BUT IT IS ALSO IMPROVED. SINCE I AM MENOPAUSAL, HEAT WAVES -NOT FLASHES- KEPT ME FROM TRYING THE ORIGINAL TEMPERPEDIC TYPE MATTRESSES, BUT THIS SERTA GEL FOAM MATTRESS DOES NOT TRAP THE HEAT, JUST LIKE THEY SAID. SINCE THERE WAS SOME DISCUSSION ABOUT SMELL, (AND A SERTA PILLOW I PURCHASED DID HAVE A STRONG ODOR FOR A FEW DAYS) I CHOSE TO OPEN THE MATTRESS IN ANOTHER ROOM. THIS WAS NOT NECESSARY, ODOR WAS VERY LOW. I HAD LAID IT ON A SHEET AND WE WERE ABLE TO MOVE IT EASILY TO THE OTHER ROOM. GREAT PRODUCT!!