I've Read both of his books I'm going to listen to the audio book this weekend too. My take on it is that he has a refreshing and honest approach about his campaign, lets be honest there is no bright line answer or solution to some of the very multidimensional problems in America today. I think his appeal come's from his refreshing honesty a sense of vulnerability coupled with a courage that is truly remarkable. If he promised you straight up that he would do something I don't think it would be fair when if something else popped up and if he had to change his position then all of a sudden everyone is screaming hypocrisy.
The guy is a straight shooter straight from the hip talker, at this level of politics transparency is very rare. At the beginning of the book he gives a disclaimer that the book is only some thoughts on reclaiming the america he love's so much, so he is a work in progress as well.
You can count on him on certain issues that he has made clear, he is pro-abortion, against gay marriage but for civil unions, wants the troops out of Iraq as soon as possible, and he wants to provide healthcare for every american family. You cant be mad at his stance on those issues.