About the plot:
This drama has quite a strong start, leaving you looking for answers and that's why I continued anyway. At some point, it just got... boring. I just want to know the history!!!! I was already expecting some deeply inter-woven history where the main cast already knew one another [which is true, as expected of a reincarnation kind of drama]. Over time, I honestly don't know what the scriptwriter was going for. :/ At this point, I just want to complete the drama and find out more about the history and why things are happening. Sometimes Sangun's actions are really ridiculous and questionable (if you think about it). But we know it's only possible/justified because it's a drama in the first place. This drama is action-packed, if you're into that, go ahead. Otherwise, the plot is not very interesting... It gets boring after a while before picking itself up again at the last few episodes.

About the cast:
I watched for the cast so hehe I obviously knew there was gonna be top-notch acting. However, the scriptwriting of each character... I'm not sure if it's just me but I feel like the characters are kinda dumb LOL. Especially Sangun...

About the music/OST:
Reallllyyyyyy beautiful music and cinematography.

Rewatch value:
Not high, honestly doubt I will rewatch this. It is interesting though.