I have some fairly serious arthritis in both knees but I am trying to avoid surgery. I tried cortisone in both knees but that didn't do much good. Last year I tried OrthoVisc injections (think of WD-40 into your knees) and that helped, but this winter with all snow removal, they were back to not cooperating. Anyway, I went back in today for two more injections of the OrthoVisc, but I think replacement surgery is coming next. Any experiences you care to share?