I've never heard of it either, but since I'm in the middle of my recovery from my big-time shoulder dislocation (which also sheared off the greater tuberosity of my left humerus) suffered at Taos early in March, I wonder if it might be useful for me. I'm doing lots of PT with painful stretching, and my arm no longer feels like it's going to fall out of the socket, and I can ride my road bike with no problem, but I still have limited range of motion and weakness in abduction and straight overhead. It feels like about half my rotator cuff is fused into a mass of scar tissue. I think this might have helped about six weeks ago. I like the idea in the literature about forcing the humeral head into a good position.