Figured I would share some of my expirience with Max-OT.
I tried it for about 6 months. First 10 weeks were awesome, I was getting stronger, muscles measured bigger in circumference, and I even leaned out a little despite doing zero cardio.
Took the recommended 1 week off. Came back and this time the strength gains were a lot slower, right around week 5 they stopped all together. I kept blasting through the workouts. At the end of about 8 weeks I was feeling drained and my joints were beginning to hurt so I decided to take a week off. Started another training cycle after the week off, started noticing that all of a sudden I was beginning to catch colds fairly easily ( normally catch a cold about twice a year ). Then finally one of the chest workouts I was doing the 110lb db's on the incline bench and after the fourth rep felt a pain in my shoulder. Now up to that point I have never had a single shoulder injury, so this was a big concern for me. The shoulder didn't hurt so bad but I couldn't even do a 30lb hammer curl (normally used 55's and 60's) let alone do any pressing. Stayed off all upper body work for about a week and the shoulder felt good again.
My issues with Max-OT:
Overall a good program that takes into consideration points of intensity, volume, and recovery.
The 4-6 rep range on pretty much all movements is a huge mistake though. The 4-6 range on tricep extention movements is absolutely brutal on the elbows, as well as your shoulders when it comes to movements like dips, and db chest presses. Also while it works well for squats and deadlifts, it absolutely sucks for movements like hack squats and leg presses.
Now keep in mind that I was following the program to the "T" as it was layed out in the Max-OT pdf file. I noticed that a lot of people that were doing Max-OT for extended periods of time would modify it outside the key rules that are layed out in the beginning of the program.
The main reason I am posting this is if you guys begin to run into some of the issues that I have ran into, treat it as a warning sign and don't try to blast through it.