Took me a long time to get around to reading this one, but I finally got off my bum when my colleague wanted to borrow the book from me. 
 I devoured it in a day once I'd actually got started. 
 Although the story followed some basic principles of YA story telling (principally: herione and romantic interest must have "tension" in relationship, caused by something small that is blown out of proportion, that they must learn to overcome individually in order to be able to rediscover faith in each other and their love), the further exploration of the society presented here was enough to distract me from the formulaic parts of the whole. 
 Additionally, the way that Veronica Roth doesn't shy away from killing off pivotal characters is something I really appreciate about her work. It adds that extra edge to the story. 
 Now to find out how it all comes to a head - I'm sure it'll be epic!