I like using this cushion and my back is usually pain free.
I find this cushion really works well when I can keep it in place. It is a little heavier than similar ones since it is made out of that gel kind of stuff the seat cushion is made of,  and comes with a nice cover. So with my particular chair it kept slipping a little lower than I wanted it. Has a Very Nice Adjustable strap with a nice plastic clip. I imagine on many chairs it might work better. I could not sit up straight comfortably in this chair until I had this back cushion and since I can place it where I want, it works great! I simply put a strap vertically from the top down and around the strap so it stays at the right height for me now! Very Nice Product. I enjoy that it is no hard and there is a little Give to it.
Rating: 4 stars