I used Birnbaum's way back in '86 for our honeymoon in Disney World. It was great, so when DH and I started planning our "Trip of a Lifetime" with our kids, we bought the new version. Great Pictures, but not a whole lot of useable info.
Then I found the Passporter - WOW! We loved it. Used it for our March trip, and combined with the info from the boards - we had the perfect Disney vacation. Everything was magic.
Unfortunately - it was addictive magic! We went back in December to see the holiday sights, and to go on the Sunrise Safari. After reading everyone's raves about the Unofficial Guide - I decided to buy the 2003 version when it came out in the fall - I wasn't really impressed. I liked his style of writing, but felt he painted far too pessimistic a picture, and had much, too much reliance on touring plans. I was also extremely disgruntled to find info in this brand new version that had been out of date for over two years - although they update some parts - lots of it hadn't been edited at all! I decided to go with the deluxe version of the Passporter - they were running a special - order the deluxe 2002 (I've since obtained the 99 and 2001 versions, too!), and receive the 2003 update - all covers and text - at a reduced price! The Deluxe worked brilliantly on our Dec. trip - lots of slots in the binder for passes, FF cards, etc. I prepacked all the envelopes with Mousekeeping envelopes, spending money for the day, etc. as well as listing all my important info - res #'s and PS. I left it in the safe, taking only the envelope for that day, and the appropriate map (I like theirs even better than Disney's version - especially Epcots) I didn't need to bring the text - I'd pretty much memorized it all!
We received our 2003 update - love it, and unlike the Unofficial Guide, it has been thoroughly updated, with the exception of a few last minute changes by Disney, which occurred after it went to press. I don't mind that - Disney changes - but if somethings been gone for 2 years - it shouldn't be in a brand new guide!