When I started, I expected something like "A Prophet" but it turned out to be closer to "The Shawshank Redemption". It is a truly original prison movie. I loved the treatment of character's flashbacks, moments of comedy, and the humanity brought to this place and its inmates. The direction was spot on and the performances top notch.
This movie is INCREDIBLE. It is filled with realism and the acting and story is amazing. It will make you completely relate to the characters and keep you at the edge of your seat throughout the entire thing (and it's a veryyyy long movie). Honestly, if you want to watch a movie about prison, ignore Shawshank and watch this.