Bought a new foam mattress and then placed this memory foam on top. It is wonderful. I don't even turn over at night, feels like I have taken a sleeping pill! It is a nice thick piece of memory foam. It gives slightly when you get in, but is very supportive. The cover that comes with it is a little stiff, but after a few nights it either softened up or we got used to it. I would recommend this to my friends. I plan on putting one on all of the beds in our home.