I found this book BRILLIANT! As a PhD student going through the notorious 'second-year blues', this book saved me and sorted me out!!
I think whether you love or hate this book really depends on your personality. If you are quite an organized, methodological research student who is looking for formal advice, I would say maybe it isn't for you - in this context I can see how some reviewers found the book patronizing. Likewise, if you find that skills like self-discipline, assertiveness, professionalism and time management come fairly naturally to you, maybe look elsewhere.
However, if you are a PhD student who is struggling in any of these areas, please do give this book a try. If you are feeling overwhelmed by your PhD, unsure of what you should be doing/not doing, feel like you're falling into a hole or backed into a corner, if your head is MELTED, and you are starting to hate yourself and/or your supervisor... this book may help!! It gives GREAT advice, and is a source of very practical and warm wisdom in what is often an isolating experience. It helped me to step back from my feelings of frustration, boredom and despair (I was about to drop out), and really assess the professional and intellectual directions my research was taking, what was actually going on in my supervisory relationship, and how I was unintentionally self-sabotaging - it really helped me to identify my strengths and weaknesses. I didn't realise what a PhD really was until reading this book. The authors take a look-outside-the-box approach to all stages of the PhD, and every chapter is a kick up the ass, in the nicest and most constructive possible way!
I have such a renewed enthusiasm for my PhD since reading this - it all seems much more doable now, and I finally feel like I have direction and ownership over it. I go back to this book again and again. I really hope some of you fellow lost PhD souls find it as good as I did. Good luck! :)