Normally, It's the drama that makes the main leads look great and more popular. But on this one; it it the main leads' acting and popularity which makes this drama somewhat successful. Bu certainly worth watching bec KSH was too handsome here :)) I watched this bec of KSH's 3 Grand Price Awards out of it; I was so curious about how well he did on this drama. And I can already tell after watching the first few episodes; he was brilliant to make the audience laugh without trying hard; he did not need to wear thick eye glasses and weird hairdo to pull-off a sort-of-nerdy-too honest-Rookie PD..his acting is more than enough.He is also the first one to act-drunk convincingly and in a charming way. (If you watch KSH on interviews he acts the same as Beak Sung Chan at times) And I think to be casted along with a veteran in RomCOm ; Cha Tae-hyun was not easy, yet he stood out in many ways, although his character did not turn out to be as good as expected towards the second half of the drama and turned somewhat annoying (fault's on the writer side though) he still manages to make me watch the drama till the end. Well the rest of the main leads were brilliant I got fond of just watching them despite the flaws of the story. This drama is worth watching esp the first half; KSH was lovable even with poker face;and it has showed interesting facts in a workplace and a rookie's first experience at work. but there were a lot of flaws on how the story progressed and ended. Still would recommend you watching it if your a KSH fan. If not; then do not expect much; If not for KSH my score would be lower for this drama.