Honestly, I started this drama only because of Woo Do Hwan. I didn't looked at the cast, I didn't looked at the plot. I just saw him and put it in my plant to watch list.
Best thing I did that month.Because I didn't knew anything about the drama, I didn't had much expectation but that was a  good thing. Because it blew me away. It completely took me by surprise.
Though I really really enjoyed it, it might not be every-ones cup of tea. It's heavy on the crime part of the plot and there are some jaggersons or technical words- which are hard to understand.  But once you get past that part it's all gold.
The story.  It's a crime story. The good guys taking on the bad.  There are some plot holes - like every other stories. But beauty of this drama is that you can never guess what's gonna happen next. Every time I thought 'oh, i know whats gonna happen next' nothing like that happen. Sometimes I had no idea what was going on, until ten minute later.
And it doesn't resolve around the good guys. It shows the 'evil' peoples side too, their reasoning, their plan. A side to their story. I really like that.
This isn't heavy on the romance which I was ok with it, because it isn't a romance story, the lack of that romance tag says it all. But Min Joon and Ha Ri's chemistry was a bit to ....hot. I was screaming ship, ship from the moment I saw them.  Another slow romance couple is in there but I'm not going to spoil it. Same is the bromance. It's more on to the brotherly-love bromance and that goes perfect with the story line. Makes more sense.And I really really really liked the ending.  
The cast is amazing. There is no point on saying how great they were, because we all know that. I am not going to take a single person apart and talk about them, because I liked all of them. I loved how Woo Do Hwan played Min Joon. I liked Jang ha Ri and Ryu Hwa Young's attitude just made her ten times more sassy. I liked Yoo Ji Tea playing Choi Kang Woo, he brings a different set of emotion to the table. This is also the first time I saw him and I am going to check on his other dramas. Then there is Jo Jea Yun playing soft hearted, ex-gangster cheetah-shi and Kim Hye Sung playing Noo Ri.  And Cho Won Young playing JH. He is a really versatile actor. I really liked his last scene.

There are three songs in this drama. All of them are so so good! NiiHwa's song is my jam!!
Totally gonna re-watch it. Have to.

Again I am not gonna tell you that you have to watch it. But if you give it a try it will win you over on its own.  So do try it!