I enjoyed this book. It is a quick read (I finished it in a little more than 24 hours) and makes a lot of good points. As a feminist man, I agree with 95% of what the authors have to say. I fully concur with their basic thesis that feminism is a force for positive change and the patriarchy which rules our society hurts both men and women and has to go.
Positives: The book is often funny and clever and makes some points which need to be made. It also does the valuable service of being a book about feminism aimed at men. Regrettably, the men who need this book the most won't read it. The most sexist men I know aren't exactly the book-reading type.
Negatives: The authors sometimes cast too-wide a net. The discussion of unions was a little out of place, for example. Also, they address the subject of human trafficking but don't consider the argument that legalizing prostitution is the best way to combat trafficking. They do address the issue of prostitution, but give sparse analysis to how much damage to women (including trafficking in the sex trade) could be greatly reduced by legalization. It is as if they learned nothing from the lessons of Prohibition.
The authors also address the issue of pornography, but the entry is so vague I'm not sure what they're trying to say.
The key failing of the authors, however, is that they let religion largely off the hook. Sure, they bring up the misogyny of the major religions. They completely fail to hold religion responsible, however, as the primary source of misogyny in modern society. Here you have the fountainhead of misogyny, and the authors wimp-out and don't confront it as such. In this book about feminism, they neglect to confront the single biggest anti-feminist force out there. An entry on the Bible, for example, would have been entirely appropriate. They could've simply listed many anti-woman verses contained within with some short analysis and it would've been a powerful component. This failure diminishes the power of their case, and that's too bad.
I'd still recommend this book, even if it falls short in the areas above. It is fun and informative.