Overall good concept
This is the first back stretcher I have had. I am a massage therapist and know that I needed something to try it to correct my posture from bending over for hours each day. The knobs are hard plastic and are pretty pronounced. It has been painful the first day, which I expected because the muscles are trying to relax. I may have to use a pillow over it for a while. Overall, I like the concept. I like that it is adjustable. I just wish the knobs were a little softer.
Rating: 4 stars