This was one of the most enjoyable and beneficial web books I have ever read. The book is well written, nicely laid out visually and technically, includes great case studies, full of helpful sidebars, lists, diagrams and graphics, has very good chapter summaries, contains few errors and has all of the documents mentioned available for download on its companion website. Can't ask for more than that in my opinion.
I have been a professional web designer for several years now, and this book has helped me tremendously with workflow, client relations and project management. This book is not a technical book, but if you pair this book up with some of the more technical books (recommend Lynda Weinman's HOT series of books) you're good to go.