I did (both legs, but not at the same time). It was same day surgery, done under general anesthesia. I woke up with my leg wrapped ankle to hip in Ace bandages. No pain to speak of, though lots of swelling and bruising. I took the next day off from the gym and then walked for an hour every day after that, though really couldn't bend my knee very well due to the Ace bandages. I got unwrapped a week later and the swelling and bruising slowly faded.
All in all, it wasn't as bad as I expected. My legs still swell due to chronic venous insufficiency and I need to wear compression stockings most of the time, especially in the gym.
What else would you like to know?