Rich .... after five knee operations from sports injuries playing racquetball competitively for 25 years I've had a minimum of 75-100 shots in my knees. Done all kinds of steroids, cortizone, synvisc, hyalgen, the list goes on. But haven't done this one you're talking about. Let me know how long it works. If it goes well for you I might be interested in checking into it myself. Please stay in touch and keep me posted. I'll be cheering for you. I would love to find an injection that actually works longer than a few days that made it worth messing with. Good luck and God bless.