I elected to do the patellar graft from my own tendon. It was my own tissue, so better chance of it lasting. Recovery is longer when you do that. A cadaver tendon graft is less trauma to the knee, so recovery is faster but you body could reject it and run more of a risk of doing it again in 5 years or so.
Do your rehab, every bit of it, they know what they are doing and they will get you into better shape. My therapist was part of the Indianapolis Colts staff for a few years.
You should start rehab within a couple days of your surgery, first couple of times it hurts like hell. They are trained to hurt you, let them, be a man, it's only working if it hurts. Working on full range of motion sux.
I was taken to rehab twice, had crutches, Those went away after the first couple sessions and I drove to my rehab the second week. (Left ACL and I had the STi which only comes in a 6speed)
If you want to talk, pm me, I'll give you my number and answer any questions the best I can.