Cooling doesn't work.
The "temperature-regulating material" doesn't work at all. The mattress is a bit cooler than standard when you first get in, but the foam still locks in all your body heat and roasts you alive. Be prepared to wake up sweaty, possibly several times a night. The bed takes quite a bit of time to disperse the body heat and regain its original shape too. This means you can't just get up for a few minutes to allow it to cool, and any attempts to slide over, besides fully getting in the other side, will result in rolling back into the same sweaty divet that hasn't gone away yet. This mattress also has firmer edges. I'm sure this was meant to help not roll out, or sitting on the edge or something, but the result is that this mattress, even while brand new, seems to sag in the middle.