I should start off by saying that I quite liked this book, but that it's probably not one I'd return to again and again.
Firstly, the good: the book is very well written; Waitzkin comes across as a likable character, and quite humble for someone who has so obviously been a high achiever in his chosen field. He does offer some good insights, in terms of being aware of the individual's underlying nature when learning and not trying to force onself down a path that contradicts that. Plus, the stories used to illustrate his points are largely engaging.
Where I think the book was disappointing, for me at least, was that a great deal of the observations about what makes a top performer (learning from mistakes, concentrating on gaining a deep understanding etc.) are, if not self-evident, then at least variations on things that have been written about elsewhere.
nevertheless, definitely worth a look.