Overall this is a good drama. Not overly cliche, and has some unique elements to it. Each character is well developed through the drama.
I think every episode apart from the last two was well made. Every episode was funny and didn't felt dragged, except ep 15 and 16. Personally, I think that episode 15 and 16 ruined the drama, they were filled with filler and irrelevant scenes that didn't help with the development of the drama. But overall they were decent episodes. Most kdramas have their last episode filled with obvious sponsor products and advertisement, this one didn't do that. There were some loose ends I wondered about after the drama ended for example: Did Me Ri and In Seoung get together or with Mr Cha?

The acting is superb. You can never go wrong when Seo InGuk and Nam Jihyun is acting.
Ost is superb.