This is not really a firm mattress. Some areas of the mattress are softer than others. Our backs have hurt every morning since the purchase of this mattress. I would love to return it but there is no way for me to transport a king mattress back to Sam's Club. It was delivered vacuum sealed in small box and then expands to full size.

Mattress did have a chemical smell for a few days. It does sink at the edges when you get on and off the bed. It did take half-a-day to firm up. AND this mattress is the perfect balance of sinking into the mattress but not sinking too far. It's one of those mattresses that will not hurt your hip or shoulder if you stay in one position for hours. But you do not feel like you are on a hammock:) You feel like you are on a well made, expensive mattress that was a bargain!

Mattress is made from cheap foam. Definitely not high density foam. Mattress sinks when laying on it and is not medium firm support- more like soft plush. Spend more money for a better quality mattress. Took this mattress back within 1 week of buying.

Two nights used and it created a wrinkle in centre.

Mattress was packaged well and looked great, however this 'medium' is much more like a soft in my opinion.

Not very medium - feels more like a plush or soft than a medium. Luckily my son doesn’t mind it, so we will keep it as it is a pain to return.

Not happy. It says medium firm but it’s too soft and uneven. It’s either you slide on the side or pushed in the middle. Made my husband’s back pain worse and gives us body pain. We end up having to sleep in our guest room.

We purchased this mattress for our bed at our camp. Extremely comfortable. No additional mattress topper needed. Considering purchasing one for my daughter's bed.

The mattress is comfortable and fits my needs in a spare bedroom. I have napped on it several times and have really found it worth the price. I am thinking about ordering a King size mattress for my masterbedroom.

The bed is OK for my almost 6 year old son. He is a slim kid, so for him it is fine. For an adult a medium feel, maybe not so much. Maybe a firm would have been better. For now the bed will do.