Works great
I bought this product for my wife, who is having some neck pain caused by a herniated disc.  So far it has worked very well for her and relieved some of the pain, and you can't beat the price for such an easy-to-use home remedy.  My only concern long-term is that the ball bearing/tubing mechanism might not hold up to repeated use, since eventually the tubing might break.  But so far so good, and it works exactly as advertised.
Rating: 4 stars