Absolutely LOVE it! It is on a spare bed and saved my sister  back. The mattress  in the spare room is new, but  hard as a rock. I sure couldn't  sleep on it...,(Gave our bed to my mother on her visit, so  she  wouldn't have to climb the stairs).
My sister came again, and we made  sure to get this  topper, it made a  world  of difference! She could  actually  sleep on the spare bed comfortably,