I had the surgery.  The patella tendon autograft used to be the gold standard.  Now the cadaver allograft is just as good.  The downside of the autograft is you are removing tissue from one area of the body (patella tendon or hamstring tendon) to replace the ACL, the net effect is two surgeries, more pain and PT rehab.   The cadaver allograft on the other hand is just the ACL replacemnt surgery.  In both cases following surgery the graft goes through a healing process called revascularization.  The graft is strongest the day after surgery then essentially weakens over the next 8-10 weeks as the tissue dies and then subsequently regenerates through the revascularization process.  Whoop te do right?  Well, in my mind, the cadaver is less intrusion on the body, less pain and the PT can go along quicker as you can start quicker.  The healing strengthening and other physiological aspects still take the same time.  It comes down to preference of the Dr.  My allograft is great.  I still play soccer.  Of course it took me one year post surgery to come back and it feels better in year two.   I know he is seeking several opinions from the best in the country but the guys at UMASS are just as good.  15-20 years ago yes those guys knew ther stuff.  But nowadays it’s routine.  Actually what’s worse is when thers is meniscus damgage in additon to the ACL.   I actually have always felt the meniscus and mine was minor.  All bets are off if he hurt the meniscus too.