My wife bought this for herself and suggested I try it, being I've had lower back pain and was going to the chiropractor. I tried it once, and I could tell you it has worked (for me). Everybody's situation is different. I'm going to continue to use it and hopefully, the pain I have in my knee will subside as well. I will keep you posted. My wife bought the product at an As Seen On TV store.
Bottom Line: Yes, I would recommend this to a friend