Perfect! Within 2 days it's at it's full thickness, and it is so amazing. It's definitely cooling but not to the point of being cold- and then so so so comfortable. Don't expect something super plush from this (it's only 6" thick) but if you want a firm mattress like I do this mattress for this price is perfect. About the chemical smell- if you press your face directly into the mattress the first night it does smell a little funky, but you can't smell it with your head on a pillow above. I have super sensitive lungs because of my asthma and it didn't bother me at all! All in all- so happy I bought this!