Direction, filming and music along with real acting. If you like action movies you'll enjoy this. It moves fast and is exciting all the way through.
The movie is raw, some nasty scenes but that's also why it feels real.
The director did an amazing job in filming, close up, birds eye and at times you felt part of the movie.
I recommend the movie, it's not for the faint hearted, but if you look away at some parts...you'll appreciate the film.