At 7 months post op my biggest issue is weakness. I don't really have much pain anymore but every once in a while I'll get a twinge in the graft area where I had my injury. However, getting strength back is a SLOW process. Even though I work out 4-5 times a week, it is still painstakingly slow and I have seen incremental progress over the last month.

Here's a video of me doing some of these quad strengthening exercises:
Stairs: Stairs are slowly getting easier. I can go down stairs now without having to hold the handrail but I still do just because I feel more stable. Going up stairs I still have to hold on the hand rail pretty tight.
Cracking and Popping: I've noticed this has gotten better over the last month and my knee doesn't do this as much anymore. I guess the scar tissue is breaking up.
Overall: I think the most important thing that I learned this month is that regaining strength is a slow process. It just doesn't happen quickly no matter what I do. It took 2 months of doing lunges in parallel bars to get to the point where I could do them without holding onto anything like in the video. The definition in my VMO when compared with my non-operated leg is significantly different. I think this is why I have such trouble with stairs. This muscle is important when doing the step up motion. When I look at where I was 3 months ago, I have gained significant strength back so remembering this is how I stay positive.