I have the book and use it. It clearly states in the book exactly what and how they rate each park, and the vast majority don't get 10's across the board. If an RV park doesn't have a pool or a swing set, it doesn't get a 10 in that category. That's OK with me because I don't use a pool and can't fit in a swing seat. And, as a single RVer, a teeter/totter isn't a big draw. OTOH, if they don't have FHUs, I like to know about it so I can avoid it. Other folks have different criteria.