What some buyers would call "negativity" I call honesty; that's all one can expect from a critic. Honesty distinguishes the Unofficial Guide from all the others.
I've been reading it and Birnbaum's guide simultaneously since 1986, and I've been distressed by how much the Birnbaum guide has, for all intents and purposes, become the "official" guidebook, owned and edited by the Disney company, and it happened sadly shortly after Steve Birnbaum's own death in 1992. The Birnbaum book never has a wrong word to say about a restaurant, calls every experience "delicious" and "fun," and rarely dissuades you from thinking that the Disney experience is the best on earth.
The Unofficial Guide, on the other hand, tells it like it is. You can disagree with its opinions, but its writers know what they're doing, and you can respect their intentions.