For me, I must admit that Lee Joon Gi is the reason I watch this and have to bear watching till the end. I am his fan.

The opening is interesting, after Ep. 4 things got too boring. I skipped the boring scene all the time. Many people said the bad storyline put down this show but I do not agree. The story itself got some good points but the scriptwriter messes many scenes to the stupid boring of the female heroine. Her role always shows her innocent and mistakes. I should be ok if it is only one or two times, but this was like too many stupid loops running. Girl, I am so sorry, you are annoying.

Things get better after Ep 12 to14 and yet I still have to skip. It became my routine for this show.
Acting:
I tell you Gwi (Lee Soo Hyuk) has his vampire aura and I don't skip is his scenes. I gave him 9.5/10.

I saw some reviews that said Lee Joon Gi and the female heroine got good chemistry. I am like "what, really" what is he saw in her to make him love her.

LJG acting for this show I score 8/10, he did a much better job in the other shows.

For the second female lead, Kim So Eun, I like her role much more. Mostly because her role is complicated, sad, deep and she makes no stupid mistake. The development of this character is well done. She and Gwi hit the top point for the talking after killing.

I think the whole drama should be made for 10 episodes long and cut the stupid scenes.