First of all... wow... amazing story.. amazing cast.. great ending.
Although there are some similar drama like this... but I find this drama very interesting.. and each episode made me curious and wanting to watch the next one as soon as possible...
The plot twist in the end was really good.. Tho some of my predictions were right but I never imagine the plot twist.. which is good... I love dramas like this.

The cast.. was super amazing.. their chemistries are amazing. Yoo Seung Ho really delivers the characters well (knowing he played mellow characters a lot), love seeing him in this drama.
Lee Se Young's acting and character portrayal was great as well.. the chemistry between them was really great...
I will miss their bickering a lot.. as well as the trio (Dong Baek, his chief and Se Hoon).. without the trio... the story line will be too serious...
Yoon Ji On's portrayal of his character (Se Hoon) was really great.. I think without his character and the chief... there won't be much comedy in the drama...

Overall... the story was great... I really enjoyed the drama very much.. will re-watch it later on...