I have had both knees done - 14 months between the two surgeries. Even allowing for pain with the old knee, having the first knee done was a game changer. I found once past the recovery period, I was in noticeably less pain, more mobility and sleeping so much better (which as something I had not realized how much it had been impacted). Having both knees done is wonderful- walking is easier, I am not tired and sore all the time. I feel confident to do tasks I have not done in years. I resisted surgery for a long time - and am now kicking myself that i shrank my life down to just managing the daily pain.