Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Perfect Balance of Intelligence & Action

This film deftly blends martial arts action and serious intelligent drama. The closest thing it reminds me of is Angel Dust, a Japanese thriller with a similarly well-crafted feel and a similarly gripping and disturbing story. The visual style, fight choreography, suspense, and irony, as well as the exploration of memory, willpower, and responsibility kept me on the edge of my seat for most of the film. Oldboy is reminiscent of The Usual Suspects in the way it encourages the viewer to work to figure out what's going on. Highly engaging. Recommended. Note: Very violent.