I am a physical therapist and we recently bought a $5,000 medical cold laser unit for our department. I began using it for a tendon injury in my hand and on several patients and it seemed to be working to cut down pain. I wanted something I could use at home and began researching the various light therapy devices. Some of them had good reviews and were cheaper than the Tendlite and then I saw the problem. They needed 30 min treatment sessions. As a PT I know that that's a prescription for failure. No one has that kind of time. The Tendlite only needs 1 minute used 1-3x/day. I've been using it and notice a definite increase in grip strength, increased range of motion, and decreased pain. That being said, I coupled the treatments with modifications of daily activities, ie cutting down on the tendon-injury causing activities so that it could heal. I highly recommend this Tendlite as a conjunct therapy. Even though it costs a little more than its competitors, it's a bargain.