AWFUL!  Like sitting on a board. After using it for 3 hours my back & hip pain were MUCH worse!!
I got this cushion for Christmas. Tried using it on 12/27, after 3 hours, when I stood up my back and hip pain were much WORSE!! I am still in more pain  today (12/29) than I was in prior to using this cushion. The cushion is as hard as a piece of plywood.
Rating: 1 stars