I'm quite ambivalent about my rating for this book. I actually didn't like the book much and found the protagonist unlikeable. But having said that, it is written in a refreshingly original voice and I liked many things about the writing style.
I liked (although it may sound odd) many of the up-front, frank references to things like toilets and smells and dirty undies and bad breath, which in almost all junior / tween fiction (except for the deliberately gross stuff) are quite consciously ignored. It seems to be an accepted thing that because it would be so awfully inconvenient to have to factor urination and defecation into plot lines, we all quietly agree to pretend they don't happen. In this book, although we don't have an excessive focus on them, they are not ignored and they quite frequently rate a mention.
And furthermore, there are probably a lot of personal reasons why I didn't enjoy the read or the protagonist; Stunt Boy is not the thinking, feeling, introverted type that I am more likely to identify with, and that would more closely resemble my own children. No, he's basically extroverted, he's volatile, impulsive, and an action-boy who frequently puts his mouth before his brain; offends a lot of people close to him with impulsive accusations, and pisses off his best mate with his egocentric behaviour. Not my choice of best buddy. And truth to tell, the idea of the under-age risk-taking of his lifestyle makes me uncomfortable. (Not that I'm for the alternative suggested either - playing safe computer games instead. Pah!)
Anyway, I think I've explained my rating enough. My 11 year old liked the book. He didn't rave about it, but he liked it. We both call it 'quite a good book'. But I didn't enjoy it.
Action kids may well absolutely love it.