Pros
I love the characters, especially Tobias. I love how strong Tris becomes; her character development was interesting to follow. The story line is wonderful, and I can't wait to read the next book. I liked the plot twists. The relationship wasn't too quick to develop, which I thought was nice for a change.

Cons
I found a lot of the major plot twists were somewhat predictable. The writing style took me a while to get used to.

Overall, I thought it was a great book and I'm looking forward to continuing the series.