Yair said:You do realize the challenge and token rules are probably not declared OGC? IIRC, only the skills chapter is OGC. (Don't own it, just skimmed it.)
Actually, the skill challenges appear in the skills chapter -- which is designated as all OGC -- so they're clearly open.
The token rules get strange, though. The master token rules appear in an area of the book that is not designated as open while the ways in which the individual classes gain and use tokens -- presented under the class features section of each class -- are clearly designated as open.
As to should you buy or not. I say buy.