I guess it might depend on what info you are focusing on in the book. We used it mainly to help devise a bit of a touring plan on our first vacation over Easter 2000. For being on the othe busiest weeks of the year, I can say that by using the advice given by the book, and the fastpass, the longest line we waited in was the ride in Norway, and it was about 20 min. But, I will also say that it didn't say anything much different from the info I have gotten from the boards. The most valuable advice that we followed was in regard to epcot. We did this whole park, and was able to avoid most of the crowds. But for our first trip, and before I really read much on here, it was a life saver.