Loved my Passporter!!!
I used it to reacquaint myself with the World on our trip last April. It had been 10 years since my last trip, but for all intents and purposes, it was our first trip.
I don't have a lot of time (had a newborn and 2 year old at the time) so I found being able to pick it up and read, set it down, and pick it up again was a breeze. Everything was digestable yet very thorough. The hotel info, the parks, etc. Granted, I don't put much stock in the itineraries and such... I marked up the book with a highlighter and those little mini post-it tabs with the info I needed to find quickly and everything was a snap.
The other major thing that I liked was the fact that you can browse book updates online. The book goes to press in October (or so...) of the previous year, things change. Once the authors find out about the changes, they make the corrections online to keep the info as accurate as possible. Shoot, I bought ours in January of this year, and by the time I got it, 2 stores I wanted to go to in DTD were closed, but the updates were online for me to see.
I took the book with us and actually used it to help someone who was lost in Epcot during evening EMH! The maps are detailed, yet small enough to fit in the book. The girl was close to where she needed to be, but there weren't signs to where she was going!
The book also helped me narrow down my choices for hotels. I was able to read up on all of the resorts (once we figured out our budget) and decide what was going to work for us. We didn't get in to our first choice, but I'm REALLY glad we ended up where we did. It ended up being the right fit for us.
Best of luck.