I'll agree with fakereadhed. If you didn't use yours last time, it may not be for you.
I love mine and wouldn't plan a trip to WDW without it. We do more than just the average visitor that books a package at WDW. For that you would just need a place to record your reservation number and your ADRs.
My PassPorter has a place for my reservation, ADRs, rental home info,
trip insurance, flight info, rental car reservation, Segway tour info, etc, etc, etc. Maybe it becomes more useful as you find out more about WDW and all the things to do there.
A simple notebook would never be able to hold all the stuff that I collect before we go and after we are at the parks. Receipts, napkins, etc all go in the pockets at the end of the day to use in scrapbooks or just for the memories.
I also agree that the maps alone are worth the price of the book. They are sturdier than the regualr park maps. They are easier to read and include the travel time from one attraction to the next. And don't forget the 'Attractions at a Glance' on the back of the maps. We have used that repeatedly when trying to figure out if we have time to fit in just one more thing before we run out of time. The size is perfect as well. It is easily folded into a fanny pack for use throughout the day. (This year I'm going to laminate them since the whole family likes to look at them, we end up with lots lof sticky fingerprints.)
If you do decide to go with a PassPorter, the Deluxe is the way to go. Being able to take out the stuff you don't need or to rearrange the information is well worth the money.