It was enjoyable, but like much of Gladwell's books, it depends way more on "Ohhhhhh....... aaaaaahhhhhh....." than any real theses. That said, it still is an enjoyable, worthwhile read, and it gave me things to think about in a whole new way.
I have to admit that I didn't quite get it when he waxed poetic about the KIPP schools. I know nothing about these schools - the sum total of my experience is what he describes in this book. It sounds like child abuse to me, and I'm not certain that it's a good example of an Outlier.
I listened to the audio version, and it ended with an interview with Mr. Gladwell. The interview was mostly Canadian Anti-American Socialist claptrap and it really left me with a sour taste in my mouth. Without the interview, I probably would have felt a lot better about this book.