There is only one word that can describe it: overwhelming.
I have only been twice overwhelmed by tears to the point of suffocation by Korean dramas, the first time was not a good one as it was too cruel, however..
This drama is on a new level, i have never expirienced something so amazing on a screen before, i mean i knew this screen writer was very good but i have no idea how she manages to outdo herself every time..
any way, this was the best drama i have ever expirienced hands down, and aside from a few overly dramatic scenes that are borderline sci-fi, this was a perfectly flawless K-drama that might be a once in a lifetime expirience.