Transitioned from an old Sealy memory foam. I was worried this mattress was going to be too hard, but it's perfect. The core holds up enough for support, while the top layer feels like a plush layer on your standard mattress. I'm going to buy the mattress protector next, because I think it's my old one from my previous mattress keeping in the heat some nights. I notice a difference with it off. Definitely a lot cooler than your standard memory foam!