Mm, got it. I haven't found anything ridiculously spectacular or too far outside of common sense, but I think there's a reason why. It comes off so easy-going that a lot of the stuff it teaches you it makes you think you've known all along, and make it easy to remember. So maybe I've learned more than I thought from it. Got it as a present for the gf, though I'll give it to her in a week when I see her. Yay for getting to read it first, then!
