The smell wasn't bad at all and dissipated quickly.I use a wrap-a-round mattress cover (for allergies) and heavy cotton mattress protector, so I don't get too hot. Since it conforms to your body, when you roll over, you actually feel like you are rolling up hill. It is very comfortable. The mattress is slightly larger than my old foundation, but it is not causing any problem. It was somewhat difficult to get it out of the box because it was so tightly wrapped and compressed, but I managed by myself. I like it.