Totally agree. It is the second hardest routine I've ever done. I did it as written for the squat but using the deadlift as my target exercise. I used only the last 4 week intensity cycle. It was brutal. I only lasted two weeks, but I tested the DL afterwards and found an increase of 40lb. I don't know if I'll ever do it again. Probably after a while. Tore all my calluses off my hands during the cycle though.
A WORD OF ADVICE: if you are not able to recover from squatting 4x a week, don't even think about this cycle. IF you still want to do this, work on your work capacity and up your squat/DL frequency gradually. Then cowboy up and do it.