In February I purchased Brinbaums Guide 2004, Brinbaums Guide for Adults 2004, Unofficial Guide 2004, and Passporter 2004 my vote goes to The Unofficial Guide! Here is my opinion on each:
Brinbaums Official Guide Has nice pictures in it and good desriptions, but they obviously do not review items objectivley I like the getting ready to go section of the book a lot.
Brinbaum's Official Guide for Adults Skips a lot of information about restaurants, etc and I would not reccomend it.
Unofficial Guide I have loaned this guide out twice since having it in Feb (plus now I own the 2005 guide) it has helped me plan my trip...they have objective reviews of the hotels, Restaurants, good ride tips, maps of hotels, etc overall a great book I would reccomend to everyone.
Passporter I was really disappointed with passporter after hearing about how great it was! I thought the colored maps of the parks were great as were the hotel descriptions, but I didn't care for the touring section or the planning section. I thought it needed some improvements and I think I will just make my own version of the passporter with a small three ring binder.
Oh well just my 2 cents..I hope this helps.