I really enjoyed this book, and found it very quick and easy to read. The only thing that kept me from giving it a "10" was the never-ending deluge of trivia about Tsutomu Shimomura's life, and his disdain for everyone he meets.
I liked having the technical details included. Far too many books about computer crime include every gory detail of dumpster-diving and skim lightly over what happens on the computer. After all, people reading these books are likely to be computer people!
As an author myself, I understand the need to promote yourself. I don't understand the need to pepper the book with the minutia of your day-to-day life, and I'm sure my readers couldn't care less what I eat. I certainly hope that in the future, Shimomura learns to keep his self-promotion on the dust jacket, and to control his obvious contempt for everyone he works with.
All in all, I'd recommend this book. It has much better technical information than Jonathan Littman's book about Kevin Mitnick and provides a much different slant on Mitnick. If you're really curious, read both.