Well, the book certainly is little, I'll give it that. However, to me it seemed a bit too simplified. To paraphrase: in anything you want to do you may encounter a Dip, a cul-de-sac, or a cliff. Quit before you start if you are going into a cul-de-sac or a cliff, but keep pushing through the hard stuff if it's a Dip, so you can get to the other side and be the best. Certainly interesting advice, but Godin doesn't really back it up with info on how you'll know if you're headed into a dead end or about to fall off a cliff. He just says to stay away from those, and lean into the Dip, and when you get to the other side, voila, you'll be the best!
So -- my review is "eh."