My husband and I bought this mattress for our 7 year old son because he was moving to a full sized bed from a twin. This mattress is so comfortable, that we're considering getting rid of our mattress and getting one of these for ourselves. It's a firm mattress, but not hard. The foam makes it very comfortable to lie down on, and there isn't a lot of movement or sinking in when you're lying on the bed. The only downside of this is the off-gassing from the mattress. There's a very strong chemical smell when the mattress is first opened. We aired ours out for a week before moving it to our son's room, and there's still a slight odor.