I strongly echo the sentiments in Mr. Bucher's review. This is an important book. Mr. Ray appears to be a rare example of someone who is both a serious scholar and a deep practitioner. By the latter, I mean someone who is not just talking about the realization that is contemplated by Buddhist philosophy as an intellectual exercise, but who has experienced it personally through his practice. Anyone who has embarked on that path with any seriousness comes to realize that language and ideas, no matter how eloquent, can't change us in the ways described by the Buddha; only direct experience, unmediated by the conceptualization implied by language, can be transformative. The practices Mr. Ray discusses, derived from Tibbetan Yoga traditions, are a very direct path to this experiential wisdom. Ray seems also well positioned to speak to the particular needs of the modern person, including Westerners. His body-based approaches also, as eluded to by Mr. Bucher, seem especially appropriate for people who have experienced trauma. Although not discussed in the book, this is consistent with recent neuropsychological research, which is revealing the extent to which emotions and "unconscious" material are experienced and held throughout the nervous system, and hence, the body (see, e.g., the work of Allan Schore [[Affect Regulation and the Origin of the Self: The Neurobiology of Emotional Development; and Bessel Van Der Kolk Traumatic Stress: The Effects of Overwhelming Experience on Mind, Body, and Society.
I'm not sure how objectively I can evaluate the "tone" of the book--which two reviewers describe as a bit intellectual--having seen Mr. Ray at several talks prior to reading it. In person, he is warm, engaging, humorous, and most essentially, human. In fact, he emphasizes that the purpose of these practices is not to transcend our humanity, but to become fully human for the first time. I personally experienced the tone of the book in the same way I experienced Mr. Ray in person, but it's possible one may have colored the other.
I found this book, and most especially the practices Ray describes and teaches, to be extremely beneficial to my personal practice and growth. I'm not sure where the Publisher's Weekly reviewer is coming from, but my best suggestion is to ignore that review and read this book.