Marc in response.
My first operation was originally to repair my ACL, but when the surgeon got inside my knee with the arthroscope, he found the cartlidge damage - which wasnt originally picked up. So he did a MFX and debridement and then woke me up.
The following day, he came and told me that he had found the cartlidge damage and therefore couldnt proceed with the ACL repair, as he needed mine and the insurance companies OK to fix the cartlidge, before doing the ACL.
It also kind of didnt help that i was awake at 6am the following day, and had about 2 hours of quiet time before the nurses came in, to do with as i wanted, and as my knee didnt hurt, i spent a while walking round the hospital (bored), without crutches as i could weight bear. It was only about 9 am that the surgeon came in and said not to weight bear and use crutches etc.

Prior to MFX, i wouldnt say i was in a great deal of pain. My primary problem that i went to see the OS for was the knee stability - i used to have to crawl upstairs as i couldnt trust my knee to take my weight.
I actually have more pain now, due to VMO problems and the CMP, but this is primarily associated to bending and straightening of the knee whilst weight bearing.