i've had key ops on both my knees
my cousin has had key ops on one knee
another guy i used to work with has had key ops on one knee

mine were fine, but it was after a car accident and i'd mashed my legs so i couldn't give you a recovery time

my cousins was due to a football related injury and it took him a few weeks to recover back to his full fitness, but he was fit anyway so again, i'm not so sure how that will refelct for the mrs

the other guy had the op to remove a bit of bone and said it was now worse after than it was before because he had a clicking

i'd also got that clikcing where the joint sometimes locks up either in the striaght position or in the bent position and then i'm fucked for about 20 minutes because i can't do anything

over all the success rates are vey good for key ops on the knees, but there are also the times when you have small problems