This book is a little tricky because (if I understand correctly), it originated as a one-man show, and he then lengthened the work to turn it into memoir/book form. Because it wasn't originally intended as a book, I do think it can be a little rough around the edges.
Primarily for the above reason, I'm giving it four stars. Nevertheless, I am interested in Daisey as a performer, and I wanted to get a feel for his work. As this is his only published (sort of) play (and because I don't live anywhere near where he is currently performing "The Agony and the Ecstasy of Steve Jobs"), I plunged into this, and I wasn't disappointed. According to Amazon, some of his earlier plays are set to be published in May of 2012, which, since my birthday is also in May, I consider to be a birthday present from Mike Daisey himself.
In short, if you're interested in Daisey, this is worth a read (I imagine this is small percentage of the population). If you're interested in knowing what the early days of working at Amazon.com were like, this is worth a read. And if you, like me (and Daisey), consider yourself something of a dilettante, this is definitely worth a read.