This mattress is exactly as advertised. I bought this for my son's first "big boy bed" and he loves it. He has one of the bedroom sets that was a crib, toddler, and now full size bed; it has 7 slats to form a platform. This is a softer bed than many would like, which is why I bought it. Softer is my preference as well as my son's. Again, read the title, it's as advertised. True to size. Slight smell upon opening that disappeared in about 24 hrs. It also comes with what looks like a moth cover or something that completely encloses the mattress. I Left it on and put a mattress pad on top.