I have FINALLY finished this book. I stopped listening to the audiobook sometime last year about 100 pages from the end because I just ran out of steam and felt like I wasn't connecting to the characters in the audiobook- I can safely say that switching to a physical copy of the book was a really good choice! I'm not sure what it was, but I was much more engaged with this book when I was reading it myself than when I was listening to it. 
 As far as the actual plot, I'm going to have to say the same as I said with Divergent: meh. Definitely seems like a filler book in between DIvergent and Allegiant, and while there was lots of action a lot of it didn't really seem to go anywhere, I really think it could have been cut down a lot. Although, it was incredibly refreshing to have a book where a character actually deals with the trauma that past events have caused them. I really enjoyed this in The Madness Underneath by Maureen Johnson as well, and even though it can get a little repetitive and annoying it's great to have an actual realistic representation of the after effects of trauma, rather than someone just being fine after they have to do or witness horrible things. 
 But it was totally all worth it for those last few pages! It really reminded me of the Serenity movie and I can't help but picture how freaking cool it's going to be in the movie. The 'twist' is almost exactly what I had predicted it to be, but it was executed soooo well. 
 So yeah, overall kinda a bummer but it set Allegiant up for cool things, which I'm going to start right now. Feeling so smug that I waited until Allegiant came out so I didn't have to wait for this third book because I think it just might have killed me.