After being told by my wife that I needed to try this product, I went to have some fun. To my surprise I found that it works. The knuckles on my fingers have been tender for the last year or so from ice fishing in the winter. I didn’t even think about this product would or could do anything for this problem. Much to my surprise the tenderness left my right hand after just one demonstration. I was so surprised that after three days I finally figured that I could do the same thing to my left hand. Guess what? It really works. I’m a believer. My wife and I have purchased a unit to take with us now. We are so excited to see what it can do when we use it on a regular basis.