I have used the Infratonic QGM [Latest Version is CHI Palm] for the past 7 or 8 years, and it still runs fine. I am a chiropractor and have used it on children safely (they love it), patients with acute injuries, and on patients with old, long-standing problems. It is great for speeding healing of fresh, post-surgical scars. I have used it on people within a couple weeks of knee or hip replacements and it works wonders to relieve the deep aching after the recent surgery. I can safely hand the unit to people waiting for care and tell them to use it where it hurts. They are more relaxed and usually feel somewhat better by the time I can get to them. I originally got my unit when I had a number of patients who were not responding well to my other therapies such as ultrasound or electrical therapies. It helped these people get over whatever was blocking their ability to heal. The patients find the purring of the machine relaxing. It also works well when patients have a cough or chest congestion, by placing it over their upper chest. It eases the tightness in their lungs. I could go on and on with the many ways I have used this little machine. If you are wondering if it works? Yes it does.  5 out of 5 stars

Dr. Ellen