I had one done in the winter of 2014. Funny thing was, it was my good knee until it went South. I still have the same bad knee. First week was a little rough for me. I couldn't sleep in my bed. Had to sleep in my chair. DO THE THERAPY!! I will do my bad knee when it finally gives . The don't like t do them to early I guess there is concerns you can out live your knew ones.
DP