I buy a Birnbaum every year, however I also have bought "unofficial" guides as well. Birnbaum describes the attractions the best. They have the most details. The Unofficial Guide gives good advise on other aspects of your trip, especially what to pack, etc. The most unique unofficial guide is the "Passporter". The pockets in the book are very helpful for keeping everything together from you reservations, plane tickets, park plans etc. I suggest spending the extra money and buying the deluxe edition, so in the following years you can just buy replacement pockets.