It's a lot better than my old knee but I don't think it will ever be as good as a real knee in good shape. I'm walking about 2 miles every morning and it has gotten better but I still have some problems with some pain and stiffness in it. My left knee has been giving me trouble for about 17 years and had been bone on bone for so long I had worn about a half inch of bone off the outside part of the joint.
I reached the point that the knee was getting so crooked it would get out of its proper position and pinch up the nerves. I said May in my previous post but meant March. I'm about 6 months from having had it replaced. If you end up getting it done push yourself in the therapy or it will never have any flexibility.