This had the potential to be really good, but got bogged down by the annoying romance storyline with Dr. Cha and his ex-girlfriend (and the exact same cut scenes of their relationship ten years ago...). I adored the bromance between Dr. Cha and Seung-Tak, and the ghost storyline and medical storylines were both very good, but I couldn't make it through any more of the romance. That aside, the villains were pretty 1-D and didn't add much to the story. So, I dropped this at episode 12.

TLDR:
+ bromance and acting of two male leads
- poorly done romance
- underutilized female leads
+ ghost/medical storylines