Hmph. On one hand, Insurgent was the most effective portrayal of teen PTSD that I've ever read. On the other hand, it was a jumbled mess. Veronica Roth is good at writing action scenes, but she's not GREAT at it and that's a problem because Insurgent is, like, 98% action sequences. Everything I like about the book comes with some sort of caveat. I like that we get to see how the other factions work, but I didn't like that I could barely tell the characters apart. I like how we get a better look at the variety of mind control serums, but I didn't like that every time one got used it felt like an easy out. I like that Tris and Four continued and marginally progressed in their relationship, but I didn't like that the central conflict between the two of them revolved around the idea of hiding something horrible from your partner for fear that they won't trust you. BLAH. But back to the idea of adolescent PTSD...it messes you up and this book definitely reflected that. (view spoiler)[ And what the heck was with that ending? Edith Prior? What the? (hide spoiler)] 
 Unrelated: I would like a young Jeremy Renner or an even younger Nathan Fillion to play Four in the movie.