Living in Florida we have a lot of hot nights. We've tried regular memory foam mattress pads before, but we'd sweat and wake up on a wet pad. Yuk! Since this pad came with the IsoCool cover I decided to give it a try. Their shapes were very odd when they first came out of the package, but after leaving them laid out on the floor overnight, they shaped right up. My daughter's been wanting a theraputic bed so I bought two, one for each of our beds. Her's is a soft-side water bed and mine is a king size water bed. The pad fit her bed perfectly, but I guess king size water beds are longer than regular beds, so I had about a foot with no pad. I took an old egg crate pad and cut it, doubled it and put it at the foot of the bed. Rigged; but it works great. I'm going to have to get some deeper sheets, though. As far as sleeping...WONDERFUL! No sweat and wet pad. I highly recommend this to anyone. The IsoCool cover makes all the difference!