I have had both knees and 1 hip replaced, and for the most part probably abuse them. We live in the country and there are things that have to be done that can't be without getting on the knees.First knee in 2007 and hip 2009 and other knee in 2014. What ever the end up in your situation, do not skimp on the rehab. I have had virtually no problems. We are on our 2nd Fiver and would consider another one as long as I can get in. Best of luck either way you end up going enjoy the retirement.
I came back and read more of the posts. I have "Zimmer"brand knees and they have treated me well.