** spoiler alert ** 
 To be honest, I felt like a lot of the book was a little bit of a hot mess, and the writing was kind of meh at points (I couldn't get a feel for the difference between Tris' voice and Tobias' voice - They blended together for me). That being said, I still enjoyed it a great deal. And I think I'm in the minority here, but I actually liked the ending. I thought it was gutsy, and I thought that Tris sacrificing herself for her brother like that was definitely in character. The following short chapters from Tobias' POV were heartbreaking and well done. I honestly think the ending might have been the best part of the book. I get that a ton of people are upset (like, irrationally so. Threatening the author kind of upset. Calm down, guys). I liked Tris and obviously am saddened by her death. That being said, it's a dystopian, not a romance - there is no guaranteed happily ever after. *shrugs*