So, we've been to Disney World. It was as big and complicated an effort as you might expect. Some friends lent us this book before we went. We didn't actually need it, as we actually went with some other friends who were extremely experienced at going to Disney World, and they acted as our guides.
However, as I like preparation, I did read this book beforehand. It's a book for people who like preparation (else why would you buy this book and read it in advance? :). It's perfect for me, and spot on the money. The recommendations were good ideas, and matched up well with what our friends did through experience.
If you're the organised type and are going to Disney World, I think you'd be crazy not to read this and take its advice. Recommended for people like me.