Comfortable and sturdy

Not sure why other people have had size issues but this mattress DEF expanded after several hours to 12". We did lay it flat on the low profile box spring and didn't sleep on it for a day. And another person saying the cover couldn't be removed to be washed is wrong...there's clearly a zipper for removing the cover on the bottom of the mattress. It doesn't get easier to buy than this...box has handholds and wheels so you just pull it to your truck or SUV and load 'er in! Slept great on it and for the $, it can't be beat. Sure, I had a $2700 Temperpedic full foam in past....but it was warm and while I dont sink as deep in this Serta as I did in the Temper, I didn't notice while sleeping or waking without any aches. SO...money saved and value received.

I bought this mattress and after almost a month, it still did to inflate all the way. It is currently at 10-11in high. I tried calling the number provided in the description but since I bought it in store, I had to call the store directly. When I explained to the store the issue I was having with the mattress I was told I needed to bring it in. This is a King mattress and I live by myself, I cannot carry a 127 lb mattress into Sams Club. I was told "that was my problem and not Sam's Club." I am unable to return it or get a refund for a mattress that is defective. This was poor quality on a mattress sold as well as poor customer service by Sam's Club.

We purchased this mattress a few weeks ago. So far, we are not impressed. It is far from 12". It still has not fluffed up evenly. There is a slight chemical smell that just won't disappear. We live 200+ miles from the store where we purchased it, so returning it is not an option. Disappointed to have spent $600.00 on it.

We took a chance on this and bought it online from Sam's, sight unseen. I'm so glad it worked out. It's a wonderfully comfortable bed and we've been sleeping good on it. Our last memory foam mattress lasted about 7 years... This has a 10 year warranty.

Bought this mattress-1st day had a crease here it was folded and never disappeared, called Serta the 1st day-they said wait 24 hours, then they said 48, then another call 72 hours--we have waited 8 weeks for them to respond with a solution after picture after picture and 5 emails and phones calls -now they will replace for an additional $85.00 -never buy a Serta memory mattress--got a Casper and was perfect right out of the box!!

Purchased in Club. Firm Base layer is about 6 in, top 6 in is 3 layers of foam. I am big guy 240 lbs and 6'1". Way too soft for my back, and had trouble rolling over, felt like I was sinking. I returned it for one with thicker firm base and thinner soft top layers-no back pain and i can roll over without a struggle. No problems with the return at Club.

I was very skeptical about this mattress. Have been looking at similar products i.e. Purple, Nectar, etc. Seems the closest competitor for this level of quality and type was still close to twice (at old price) the price but now at this price, this thing is a "no brainer" It is on the firmer side (even for my big fine body 6'1" and 225) it was a little firmer than expected. Bad thing? Not really. The support really seems to be helping. Also noticed that wife who used to snore loud enough that the walking dead would knock on the door to inquire what was wrong now seems to sleep nearly silently. A very welcome side effect. So overall is it in the same league as say Purple, Nectar and all the high priced stuff? I think so. Is it one helluva deal? You bet!

Great mattress, very comfortable.

The "hybred" rating is too firm. We returned it,