My first encounter with Infratonic therapy was through my chiropractor. I was impressed with how much it helped my condition at the time. I was so impressed that I thought I need one of these at home! The chiropractor has the older device. It is bigger and takes up more room. The new CHI Palm Infratonic 11 is so nice, compact and just a hand held. It is more advanced that the one my chiropractor has!! I use it daily on my joints and if there is some muscle that needs attention. I am very satisfied with the CHI Palm and would recommend it. Even my chiropractor has commented on how well overall I am doing. I let my brother and a friend use mine. They were so impressed that they bought one for themselves!