Just love the stuff that's possible with this. Been crafting races using this book for an adventure I'm starting in a month or two, using only this book for races (npc and players) and the variety in traits helps generate such unique creatures. Some things might be a bit overpowered for your adventure, but the creator(s) has/have expained in the book what traits might not be suited in certain cases.

Overall I really like this book and think it's easily worth its money.