Part three of the series is a bit disappointing. It is not a bad story, but it is not very exiting either. There is some adventure, then Tris doubts herself, Tobias doubts himself, Tris doubts herself, Tobias doubts himself and then a bit more adventure.
The last part of a series is seldom the best. This book is no exception to the rule. If it had been half as thick, I would have liked it a lot better.