I have heard much of this book, and was intrigued to find out for myself what all the hype was about. I have to say that the information contained within the book appears very comprehensive and meticulously researched, however without already possessing an in depth knowledge of the subject at hand it would be hard to quantify what is said without much further research, hence my use of the word appears. A lot of the books content comes from interviews and takes the form of direct quotation from the interviewee.
On the language of the writing I would say that this book doesn't exactly flow, the grammar is in places quite difficult to follow. I found myself reading and rereading sentences to fully understand and take them in. If you are accustomed to study and find yourself able to easily digest educational text then you will have no trouble reading this book. If on the other hand you are a reader mainly of novels you may find this book quite hard going. The book contains a huge amount of factual information that doesn't exactly inspire, but the subject matter at hand more than makes up for it.
I have to say that besides the broken nature of the book, with its factual quotations and jumpy subject matter, I was unable to put the book down and do something else if reading the book was possible at the time. I found myself reading it in queues, traffic jams and even the toilet!!
To summarise, it is my opinion that this book has a something for everybody, requires a bit of devoted reading to fully comprehend it, but gives a lot in return for the effort needed to read it properly. The book stays for the best part neutral, although to stay neutral in such a subject is damn near impossible, so it is probably better to say the book sticks to the facts and the facts speak for themselves.
Lastly this book also gives a lot of references to further essential reading for anybody who would like to extend their knowledge of this subject, and or speak on it's behalf with authority and credibility.