What I like:
+ The acting: It's not phenomenal, but especially Choo Young Woo did a great job imho. The emotional scenes were great. Won Hyung Hoon is a bit stiff sometimes, but (!) I think that's also part of the character he plays. So overall it was totally fine.
+ the music: nice to hear. Doesn't get annoying. Lyrics are beautiful and matching to the story.
+ the humour: not a lot of scenes to laugh, but here and there the little nagging is amusing.
+ short intro.
+ Some dramas repeat a lot of the previous episode in the beginning of the next episode. Here they just repeat a small bit of the scene, that's nice.

What I don't like/Room for improvement:
- the plot has a lot of room to improve. I feel like a lot of KDrama with 8 episodes around 10-15 minutes just lack good writing. The ideas are always great, but the writing is so bad. It doesn't explain the whole story and I am always left with some open questions. It wouldn't take much to just explain this few things! u.u
- the kisses were not that bad. Not totally deadfish. But could be better. Still enjoyable.

I wouldn't rewatch the show, but it's fine for watching it one time. I wasn't bored at all, although I wasn't fully invested in the story either. But if you are through almost every really good KDrama and don't have anything else top tier to watch, it's totally okay go watch this. :D