i have had both knees replaced. I had some problems. But I would do again in a heart beat. I went home first time and to therapy once a day. At home I pushed myself with rocking in a rocker. Working the replaced knee just enough to bend the knee a little bit more than the last time. The last knee was done 2 years ago, I went to a rehab centre for therapy 3 times a day and stayed 2 weeks. My recovery was faster and I have more mobility with that knee. I would recommend a rehab as my results where greater. You have to move the knee and it is painful. You only get as much as you push.