I recently purchased "The Complete Guide to Disney World" by Mike and Julie Neal. This is a top notch Disney guide book.
Visually the "Complete Guide" is stunning. Not only does it have a lot of color photos, the photos are top notch. Many of the photos make you want to get off your butt and run down to the parks. I don't I've ever seen a guide book with better photos.
The guide isn't that long. It's about on par with the official Disney World guides and about a fifth of the size of the Unofficial Guide. You could bring this guide book with you but you'd want a backpack for it. It's a little too large to fit into a cargo pant pocket.
The information in the guide is diverse and they attempt to cover a lot of subjects. For the size of the guide there is a decent amount but if info is on the top of your list you'll want the unofficial guide. One thing this guide does well is adding a list for "fun finds" and "hidden Mickeys" for each ride.
The quality (wear and tear resistant) is very good. They used high quality gloss paper. This makes it slightly water resistant and helps to reduce wear and tear.
Overall this is the guide that will get you pumped up for your trip or help you while you are on your trip. If you are researching your trip, buy the Unofficial Guide. If you own both you will be prepared for all things Disney World.