I don't quite remember what drew me to the book other than the the connection to mindfulness. While I'm not an athlete at all (I work out regularly and that's it), the book sounded intriguing if even an amateur like myself might gain some benefit. I like meditating after finishing my workouts so it seemed like this could be a good book.
There isn't much here that I thought was new. As other reviews say, there are a lot of stories. His personal life wasn't all that interesting, despite the attempts to tie it all together into the mindfulness. If you're already familiar with the concept there's probably not a lot here that would totally amaze you.
Maybe if you're an athlete that has hit a sort of mental barrier or plateau of some sort and need to find something to focus or quiet your mind or want to adjust your attitude/routine then this might have some benefit. As it was, it seemed like a book filled with a lot of empty platitudes or stuff that you could find elsewhere, and probably for cheaper too.
I regret buying it as a bargain buy and would recommend library unless you're someone who might really fit the author's targeted audience.