Well here I am at 10month post op and my knees never got straight, so my surgeon is allowing me to try the JAS system. It came yesterday and what a contraption it is, but I think for anyone thats early in recovery it would work fast! If anyone is having problems with extension or flexion early in their recovery, you might want to try this thing. Since I'm already 10 months out, its going to be a trial to see what works, if anything. The rep of the system says she done this for 17 yrs and has seen it work for people at my stage of recovery. So please say a prayer! I did it for the first time yesteray and it doesn't hurt a bit. You can feel a slight pulling sensation and you turn a wheel to make it pull a bit more, you do it six times in 30 mins. Not so bad.. But when I finished my leg felt so weak and I wonder why? It took about an hour for the weak feeling to go away.. Also when in the brace I started feeling mild twitching sensations so it must be doing something or other. Just thought I would share this info for anyone interested.