Story (9.0/10):
The story is very different and runs away from the cliché of dramas. It may seem boring at first but believe me, it's very interesting and each episode will get you more addicted to the drama.
Even focusing on the main lead, the drama tells different stories of the prisoners of the prison, so the drama never gets boring. The story is touching and very fun to watch.

Acting/Cast (9.5/10):
The actors acted very well. Each character had a very different personality and they all knew how to interpret each one well.  It's very difficult to choose one favorite character because this drama have a lot of great characters.
Both the prisoners and the cops were interesting to watch and was really cool to see their friendship growing during the drama.

Music (8.5/10):
Music isn't the strong point of the drama and doesn't have so much presence ( at least for me ). The OST was comppose by rappers so anyone who likes hip hop will probably like it. They had one song that i really like it :)

Rewatch Value (9.0/10):
The drama is very interesting. They had a lof of funny scenes and the friendship of the prisoners is very cool to watch, so I think it's worth watching this drama more than once, it's probably going to continue interesting and fun.

Overall: (9.0/10):
This drama was one of my favorites of 2017. Didn't impact me so much in the first episodes but after episode 3 I started to loved it. I loved the story and especially the characters. Give a try and watch, I think all of you will like it :)