We bough a new mattress that was way too firm. For months I suffered thinking I just needed to break in the mattress. But no luck. Every morning when I got out of bed, I felt like a truck had hit me. This pad is just right. The cushioning supports my side-slipping, it bounces back to shape easily and is not hot. I love that it has a cover even though I placed a mattress pad on top. There is a light smell but it's not offensive and I think it will dissipate in time. So go for it! And thanks to all the great reviews posted which helped me decide on ordering this particular type of pad.