I disagree with alot of stuff. the author simply trying to convince you to live in some way or another becuase he thinks it's better (maybe it is for some people) but it is not close to being facts (I know it's more a philosophical healthy good life style book, but the man gotta put ideas with some basics and little science).
I didn't like his ever lasting sarcasm either. I think the rating the book is getting is exaggerated.