It's okay, a bit squishier than we expected, and you sink all the way to the mattress on it. I'm sure it will totally break down within a few months, but for now is working for us, as we purchased it to top a brand new latex mattress that is for now too firm until it breaks in. The off-gassing hasn't been too bad, I let it air and fluff for 48 hrs, the last 8 being outside in the sun, but the smell still seems to mysteriously come and go. Also, I had read that they slide off the mattress, so to avoid this possibility, put a non slip carpet thing on the mattress first, then the foam topper, then the mattress cover over it all, and have had no issues with anything moving, and I generally do not sleep well and toss and turn a lot.