@ellerbracke, your experience is quite similar to mine as well. I'm thirteen years out from my replacement. My recovery after the initial surgery was slow and rough. I had to have a couple of manipulations due to aggressive scar tissue formation. Eventually, I reached full extension, although my flexion only reached 105'ish. To this day, I get some minor discomfort at times from some of the same activities you mentioned. I refuse to kneel on the replaced knee, it is beyond uncomfortable and painful and I was instructed to avoid doing so if possible. I also get the crunching feeling but I suspect and am reasonably positive that the above mentioned symptoms for me are caused by the scar tissue I was never able to break up.

Like you, I don't really have much discomfort day-to-day unless I push it too hard and over time you learn your limits. You asked if that is about average? For me, it was pretty close, but I did see gains well in to 18 months after the surgery, so there is the possibility you can still reach some new milestones and get over some of your barriers.

@ellebracke, does your knee limit your from doing anything that you'd like – activity wise?