I bought this mattress 20 days ago and installed it 2 days ago. It is very comfortable but I have measured the height several times and it is only 10 1/2 inches thick instead of the advertised 12 inches. I am a retired Quality Manager.

The mattress is comfortable and does not have the chemical smell some alluded to. It is not a 12” mattress as advertised. I have had it for almost a week and it is 10.75 inches.

Save up your money and buy a better mattresses. This is hot especially in summer heat in Texas. I wake up a lot burning up. This is owning it for 3 years and it's still hot. We are not looking into buying a coil mattress with no memory foam.

This is a GREAT mattress! Can't believe the price. We are are 8 nights in and having some adjustment to the firm nature of this mattress coming from our saggy old mattress, but otherwise it is great. We had it shipped and it came earlier than it said. Getting it upstairs by myself was a haul, but unpackaging was easy! We let it lay in our bonus room for 4 days even though it seemed to expand almost immediately. I bought a 'cool' mattress pad for it becuase I was nervous about it being hot and actually ended up adding a blanket to our bed to stay warm. Heat was my biggest hesitation to going memory foam and that is not an issue.

I have this matress on a zinus memory foam box spring (so it is well supported), but if you put your pillow near the edge at the head of the bed your head and shoulders become lower than the rest of your body. Otherwise I would give this matress 5 stars...i no longer wake up in pain no matter what position i sleep. The matress is really comfortable.

I bought this for my spare bedroom but when I saw that it is wider and longer than the gel foam mattress I have on my own bed I swapped them. It quickly inflated to a full 12 inches and is so far very comfortable. I would say it is medium firm which I like. Will have to wait and see about it's longevity.

I honestly was a little worried about getting this mattress. I never have gotten a mattress from a box before. But I read the reviews and decided to take the plunge. However I must say I love my new mattress. It’s firm but still gives some Cush were you need it. My hips used to ache before with my old mattress. Now I sleep like a baby. Glad I made the change.

When I rolled this thing out on the bed and cut one end of the bag open, it started expanding so quickly I had trouble cutting the bag off fast enough to keep up with it. In less than two minutes, it was at full thickness. It didn't have any of that new mattress stink, either. I have joint damage to my right hip and shoulder which would bother me if I rolled over onto that side, but after sleeping on this mattress for about three weeks, I haven't noticed any trouble lying on my right. Much more comfortable.

I bought this mattress for my guest room. It is firm, but it's a softer firm than a standard mattress. It is quite comfortable to sleep on. The mattress never expanded to 12 inches, but that has not impacted my review of this product. I would buy this mattress again!

I am amazed how hard this mattress feels when I lay on it for the first few minutes each time, then it seems to mold to me. Many mornings, I feel rested, but way up with a sore hip because I have slept on a side and haven't moved all night---as far as I know. Also, Sam's never sent any kind of delivery notification on this item. It just arrived. Ahead of time and before I had closed on the new house. Frustrating.