Story: This concept felt very refreshing, since I don't think there are any other dramas that revolve around quite as much as this one (the only other one I can think of it Memorist maybe?). The writing was great and I never knew what was going to happen next. No cliches and I really liked that. Also very much enjoyed that this did not have a romance. There was way too much to focus on already. It would have just detracted from the story.

Acting/Cast: 10/10 across the board. I lovvvve Woo Do Hwan and Seo Ye Ji. Also, Jang Yoo Sang is dramaland's eternal brother. Go Joon as a freaking gangster! Freaking fantastic. Just so good I can't handle it.

Music: No OSTs in particular stood out, but nothing detracted either

Rewatch Value: High! Just for the fight scenes alone. Hardcore Parkour.

TLDR; fresh concept, great writing and acting, might make you lose your faith in humanity.