i liked it but its a hard one to recommend to people if they are picky about good writing style .. and yeah she doesnt strike me as having too much credibility on anything other than pointing out some overarching ideas.
if u listen to her audio interview on jimmy moore's show she falls pretty flat. IMO i just dont think eating low carb in the winter and then going balls out in the summer is a practical way to go for most people. id really like to see more of the ideas about the seasonal origins of hormones integrated in to a better book..
(high hopes for robb wolf's book)