There's only one profession I believe to be tougher than medicine, and that's police work. This film clearly demonstrates it. Showing two good-natured cops (Gyllenhaal and Peña) patrolling the filthiest neighborhood in the worst city on Earth (south-central LA), the hand-held documentary style photography places you right in the scene, and makes you wonder how these people survive even a month on the job. And amazingly, the movie has a well-written story with robust character development, leading to a very surprising ending. End of Watch performs the impossible task of making you respect these people, without being formulaic.
PS: Thank you, Reza, for the recommendation.