We've been to WDW 5 times in the last 8 years and we still find the Passporter an invaluable resource. I believe it is the most up to date publication out there, and I think it does a better job than the UG. I am still a user of the UG, but if it was a choice between the two, I like the Passporter better.
For instance, this year I came across a great tip of where to view the Spectromagic parade. While it did get crowded right before the parade, I was able to get a great viewing spot about 25 minutes before the parade start.