If you haven't considered stem cells instead of tnr then if people get them during surgery they have less pain and heal quicker according to Kerlan Jobe.

Hello @mistyouto, welcome to Connect.

As you can see from this thread, recovery is hard to judge from a person-to-person basis. Personally, I had a close relative who replaced both knees and was walking within a week. I myself had a replacement when I was 19 and it was a hard road to recovery that included two additional surgeries. However, I wouldn't worry about that too much considering my surgeon said of all his patients my scar tissue development was the fast and worst he had ever seen.

What I can say, is that in the end it was absolutely worth it. I went from excruciating pain after a block of walking to zero pain regardless of what I do with my new knee.

@mistyouto, what about the surgery concerns you the most?