I bought the book before I saw this post. It has not arrived yet, but I will give a review in the future.
Interestingly the VIP muscle is the same muscle you have to condition in Dr. Lin's programs for multiple male orgasms. Dr. Lin also has tons of criticism but one of his practicioners post at Th*nd3rs and I found him to be trustworthy http://www.Th*nd3rs Pl@ce.org/forum/showthread.php?t=27522 (he doen't buy supps from Lin). Also, both authors warn against conditioning the PC muscle because it can create premature ejaculation problems. Anyway, I will give you guys an honest review.
LukeSkyWalker