Ok, who all have either had a knee, hip or both replacement surgery and......

[mnhtnbb]

5. I'm going on 9 years post hip replacement.

My husband had a hip replacement 6 months after mine. We're both fine. Doing exercises is key.

Hips are very different from knees. Knees can be a lot more challenging. I've had friends who had knee
replacements and are still having stiffness more than a year later.

I think it's well worth your time to investigate reputation of orthopedic surgeons in your area who are doing the most knee replacements.
Some are better than others. The guys with the long waiting lists for surgery are probably the ones to look into first.
Talk to physical therapists in the area. Talk to nurses in the area. See if you can find out where they go--and to whom--
for knee replacements.