Good Points: Give good descriptions of attractions, including an estimate of how long you'll want to spend, and practical issues like availablity of food/strollers/etc.
Good descriptions of natural sights (beaches, parks) as well as man-made attractions.
Bad Points: Seems to take a very narrow view of what kids are going to enjoy. Why assume that no child is capable of enjoying an art museum? Or, as the authors states flatly, that kids hate scenery, and that your teen would much rather stay home with his friends than actually travel with his family? (Author suggests spending time at the local malls if you are travelling with teens!) Or that kids won't eat anything but hamburger-based kid's menus?
Given that the book is covering a large geographic area, and given the author's abovementioned narrow view of 'kid-friendliness', many important attractions aren't mentioned at all.
Only a few accomodations recommendations are given, and most are very expensive.
(This review, incidently, applies to all the books in this series; California, Florida, and Washington DC).