Donny, I can only add to the many comments and emphasise (only if you have the time), Build up your leg strength prior to the op, and DO THE REHAB.
In my case and partly my fault, the importance of the rehab was not put to me post op, and eventually the surgeon put me back in for manipulation to achieve 90% bend of the joint.
Four years down the track I am rarely conscious of the implant.
It is not perfect, but it is a damn side better than when I had it done ?????

Ray (without the limp)