Sprained my back and got this to help my spine. Easier than going to the chiropractor and more accessible, plus the price is right. Only used it for the first time today (the soft side) but I immediately felt it digging into the knots in my back and that was a pleasure. Felt my back start to open up and I felt surprisingly good after just a minute of rolling. I didn’t even relax all the way this time, and I know that’s supposed to make it work even better. Going to work my way up to more time on it and do it consistently and will update after long term use.