I had so much pain with my knee that I did not hold much hope for this knee strap. Well, I began to wear the knee strap, not all the time, just when I went dancing or walking. Within a week I did not have any pain. It has been about three years now and I NEVER dance without the Cho-Pat.I NEVER go walking without the Cho-Pat. It gives me such unbelievable support that I don't dare to go without it.