1) The coverage of current scientific understanding of nutrition is comprehensive and detailed, yet clear for nonspecialists.
2) The text is well organized with a quick overview, followed by helpful recipes and tips, in-depth scientific information, references and two good indices.
3) It is apparent that the author is an experienced nutritionist-- she understands the practical problems faced by those of us trying to improve our diets, and she also is sensitive to the fact that food needs to taste good in order to satisify.
Cons:
1) The book is very focused on vegetarian foods and possibly slights the nutrition of food derived from animal sources. (However, after reading the book, you may as I did change your view on the importance of meat in a healthy diet.)
2) The book could be seen as a wholefoods manifesto. For example, the author promotes sustainable agriculture and organic farming. These topics are really outside of the scope of a book on nutrition.
I *highly* recommend this book. Following its guidelines has made a major improvement in my quality of life. (This is the book I come back to after having read a shelf full of diet and nutrition books.)