Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An exciting movie

A group of locals rob banks in a Boston neighborhood. The leader of the gang becomes involved with a woman who witnessed a robbery, and his relationship with her threatens the bond with his lifelong friend and partner in crime. The leader wants to leave Boston, but is forced into doing on final job. Ben Affleck really knows these Boston neighborhoods and their people. The film's authenticity is its strength, along with some taut, exciting bank robbery scenes.