OK: first things first. This book will challange some of your beliefs, so if you don't want that, then don't buy it. Otherwise, buy it, suspend judgement for a few hours, and enjoy! Remember that when the author uses words like 'should' he is only expressing his personal opinion, it's up to us to decide whether we agree with it or not.
Since this sort of book is explaining the views of another religion, one that is very different to what we might be used to, it's always going to be tempting to label it 'cultish' or 'extreme', unless it's read with a very open mind. Having read the book, I can't find anything cultish about it - no one, having read and understood this book, is going to try and abandon their family or have their brain washed or anything like that. Quite the opposite, in fact: by explaining things clearly, the author makes it quite easy for the reader to make up his or her own mind about what's put forward. Sure, it might take a few readings to fully make sense of, and some of the ideas might seem a little strange at first, but I think that's to be expected from a religion that's comparatively new to the West.
I know from having read some of the author's other books that he makes a point of explaining that this strand of Buddhism should be practised in conjunction with your everyday life, not apart from it. This to me seems particularly heart-warming, since you're not being asked to give up your family or friends to get the benefits out of the practice of meditation. I've found some of the things in this book difficult to understand at first, but at least I can come away knowing that I don't have to climb a mountain or become a monk to put the ideas that I did like, into practice.
The clarity of presentation is impressive: maybe some difficult ideas or unfamiliar terminology, but on balance this is a particularly accessible introduction to Buddhism. I think there's even a glossary that explains some of the unfamiliar words. The book repays repeated reading with an open mind: be prepared to have some of your beliefs and assumptions challanged but don't feel as though you *have* to believe anything. Make your own mind up. I think this book was written as a simple explanation rather than a rulebook of what Buddhists should and shouldn't believe.
All in all, this seems like a practical and illuminating book that makes for a rewarding read. Recommended.