Ignoring the fact that this has pretty much every YA sci-fi cliche in the book. It makes really good usage of those otherwise-tired tropes, Tris is characterized well enough that she doesn't feel like a typical blank slate, the prose is strong without being overdone, it's an incredibly fast read, and it's never boring (well, okay, maybe a bit at the beginning). It's essentially a popcorn book: the literary equivalent of a good summer action flick. And this book reminded me strongly of the massive fun I had reading The City of Ember when I was fourteen, which is never a bad feeling to have. I'd like to see where things go from here.