I'm currently using this topper to help remedy the HORRIBLE basic mattress that comes with pull out sofa beds. I do not have the means to purchase a full bedroom set and new mattress, so I needed an effective alternative. When sleeping on that mattress you can feel all the coils and metal bars underneath, making it one step up from sleeping on a rock. First off, I did NOT notice ANY chemical smell from the foam when I originally unrolled it out of the package. This seems to be a common characteristic amongst foam toppers from what I've read on several reviews, so it was expected. I was pleasantly surprised when there was none. The form regained shape within hours, and didn't have to wait 24 hours as on the instructions. I laid this bad boy out and put the fiber cover on top, and it has made a world of difference. No more coils, or metal discomfort. I melt right into bed, as it hugs me, and sleep like a baby. I highly recommend this item, and will definitely look to purchase another one when I make the move to a bigger and better sleeping situation.