I purchased the book, and "their" idea of saving money at Disney is to use the All Stars and to bring your own breakfast and lunch. They list other options for discounts, so if you are not planning on Disney exclusively, they might be worth it. It wasn't worth it to me, because my trips to Disney are strictly for Disney. Hope that helps.
MJames41
1973 Offsite
1984 Offsite
1985 Travelodge
1995 Fort Wilderness Home
2000 All Star Sports
2000 Contemporary