Bought this for the reviews, it is NOT FIRM at all. Actually going to return it. Not sure on the great reviews. If you want soft and squishy and back breaking go for it. NOT FIRM, returning it due to so soft I am crippled. I ordered firm for a reason and this is not it.

Defective-as others have stated, it has a lump in the middle. Bought it for my guest room. Contacted Sam's through chat to find how to complete a return. They just said I needed to talk to the store. Store said I could put it back in the box (which is impossible) or wrap it in plastic. Then I get to stuff it into my car (which it won't fit in) and drive it back. I also don't live near Sam's so this whole thing is incredibly inconvenient. I tried to upload a picture, but this app only gives me an error message.

Bought this for my 2 years old. Toddlers need medium firm for their spine development. I waited 3 days to fully expand but It was still soft. It is softer than soft mattress. I am 240 lbs and when I sit side of the mattress I drowned all the way down to box spring. It is still okay for my 2 years old because she is only 35 lb but If we want to sit on it for putting her to sleep It is really annoying. So I returned and got the one with springs. My 3 stars goes to Sam's club customer service.

Very comfortable. I wish it was just a tad firmer, but comfortable nonetheless.

Felt more like soft rather than medium firmness. Way too squishy for my liking.

One corner didn't expand to fill well but not bad enough to trade out.

This was so easy to take home and set up. The mattress was so comfortable!

It it way too soft for a medium mattress.

My husband loves this mattress

Super comfortable bed and easy to get, haul, and install!