I ha.d both mine replaced Sept. 1 last year. Definitely went way too long before having it done and am wondering now why I was so chicken for so long! Went to rehab hospital for two weeks and then home with a walker and cane. My leg muscles were so out of shape that my recovery has taken longer (I think, maybe I am just impatient), but I walk very well now and every week I find it is easier to get up from a chair and out of the car. So, do your exercises faithfully and strengthen those leg muscles. By the way, have to brag a little! I have 146 degrees in the left leg and 140 in the right! Good luck and recover well.