This show has been one hell of an emotional roller coaster. It really hurt where it was supposed to hurt, it's that type of a story.
The acting was good and really, the story itself and it's progression was definitely smooth, despite having many parallel story lines going on of different characters. The Director and the Writer did very well in this regard. Personally, I've seen many shows where they mess up the story line if a lot of things going on in one drama, but, Not this one. Although one of two details are missing that should have been addressed. But, you can't really expect more from a drama that's just 12 episode long.
The cinematography was great, although most Korean shows have them. It's the overall progression of the story that really did the job for me, It wasn't too fast, neither too slow, just my cup of tea.
Overall, a good show, with a very good cast, good story line, good acting and great music.