The information in the book was extremely helpful. It gave clear explanations of the advantages of BLW, how to go about it, what are the difficulties that could arise, and even how to answer questions that are bound to come up from friends and family members (which has already happened with us). It was written in such a way that was easy to read but didn't come across as patronizing or judgmental, as some parenting books do (for example, they would talk about breast-feeding and formula feeding equally).
That being said, I think the book probably could have been condensed into about 20 pages. It was incredibly repetitive. I found myself skimming paragraphs and even whole sections. Because of this I have to give this book a 3.5/5 overall, but 5/5 for usefulness!