Instruct: Classify a given Amazon review as either positive or negative.
Query: Excellent, gritty, LA cop movie

This movie reminds me of the movie "Colors", only updated to present day. There is a bit of "Adam 12", "Colors", "Training Day", all mixed together and updated. Well done, and understated with the handheld camera techniqued. Keeps you glued to the screen, all the while developing the relationship between the two LAPD cops on patrol. Definitely a must-see.