@jaypro ... Just now seeing this post, but might as well add my input.
To date: 3 ACL replacements .... first surgery I used my hamstring for a new ACL ... was working great until I over worked in the gym, and then being dumb tried to squat to much ... collapsed on the squat and re-tore the ACL ... Second surgery I used my quad for my new ACL ... And I love it, my ACL feels extremely strong, this was all on my right knee (5 months apart). Recovery time from the 2nd surgery was about 10months, (jumped 200 a malibu open 10 months post opt)
Then the 3rd knee surgery (left knee). took the quad route again ... I got more aggressive with my rehab and off the water training ... jumped my first pro event 6 months post opp.
All and all, I still have knee pain, my cartilage is pretty toast, but i elected to keep my torn cartilage in there rather than pull it all out and have bone on bone issues. I have good days and bad days, but my knee stability is very strong, my ACLs feel very solid. With enough adrenaline and advil I'm still jumping far with no problems. So take your rehab extremely serious, if they ask for 90-degrees of range of motion, give time 100-degrees, keep the rest of your body fit, get a solid knee brace (CTI) and you'll be having fun on the water in no time!
Zack Worden