The Amazon reviews for books such as this are interesting, but you need to keep in mind that at least SOME of them are very likely written by people who know the author or have some personal or financial interest in seeing the book sell. (I can think of at least one instance on Amazon where a diet book had a plethora of rave reviews - then after Amazon introduced "Real Name" attribution it turned out that most of the raves were written by the AUTHOR and the author's spouse
)
(other reviews I tend to ignore are the ones where the writer has only been on the plan for a month or less - IMO it's LONG TERM results that matter.)
Recommending that an average person take up to 30 supps is ridiculous and extremely expensive - not to mention potentially dangerous without a doctor's supervision (there IS such a thing as 'vitamin toxicity'). I note that one of the reviews on Amazon states that a 'colon cleanse' is one of the recommendations of the book to 'rid the body of parasites'.
I also note that another review states that the author cites the old chestnut "overweight people don't eat enough calories" which is basically untrue IMO (it's based on old studies that were done using recall or in other words 'taking the study participants at their word' - more accurate studies using the doubly labeled water technique have been done where it was shown that participants underestimated their caloric intake by 50% and OVERestimated their exercise time by 50%).
Anyways...if you DO decide to do this diet, I would strongly suggest talking to your physician.