If V. only recounted his experiences with the old shamans, the book would have been superb. Unfortunately, he decided to insert into the book his own personal issues and musings on the nature of reality (which tend to go on and on) and which to me seem to be rather cliche-y. this guy is a doer, not a thinker and all the theory just detracted me from the magic of his experiences. V. also seems to be unduly impressed by his newly acquired Ph.D. in psychology (from a little known local college) as if a degree means anything these days.
Still, I find Villoldo's accounts to be trustworthy and in my opinion this book is a useful read for people interested in Peruvian healing practices and in energy work in general.