@mechellec, I am wishing the very best for you on Friday! It's a really tough judgment call and in the end, we all do what we feel is best for us.

I know how frustrated you've been and how much you want to get back to all the activities you enjoy, so here's to finally making your decision and getting the very best possible outcome!
How interesting to hear that patients, and most likely docs and PT's, used to be satisfied with 90 degrees! I know the last time I was measured, I was at 98, and for the most part, feel I can do just about everything I'd like. But...I am older than you, most likely don't have the same athletic goals, am retired with more time on my hands, and so can afford to travel the ...er...*scenic route* to recovery.
Now, here's what resonated with me most:
"He also said he doesn't know why some people get such stiff knees and are slow to bend but it seems to be more common in middle aged women. Aren't we lucky?"
Why? Because it must mean I am still *middle-aged*, LOL!