Overall, this is a solid, enjoyable drama that I would recommend to anyone who likes romances where one person is human and the other is not. I'm really impatient and only fast forwarded a little and I finished the show, but it had some issues.

Cast: This was my favorite thing about the show. The cast was excellent, especially Seo Kang Joon and Lee Joon Hyuk. SKJ really killed the 2 performances of Nam Shin 3 and human Nam Shin. You could see in his mannerisms, expressions and even how he walked exactly who was who. LJH had great chemistry with him which was remarkably different whether SKJ was playing NS3 or human NS. The other members of the cast were great too, although some of the characters were a little flat, I still think they all did a good job.

Writing: The unfortunately was my least favorite part of the show. It wasn't terrible, but there were 2 big issues that stood out for me. First, the pacing was way off, especially at the end of the show. There were times when it felt too rushed and other times where it dragged too much and it felt like it would be pretty simple to fix just by moving around when things happened. Second, the female characters where not super well written. They mostly came off as annoying and one dimensional, which is a real shame. The male characters were much better which is unfortunately a common issue.

Music: Was fine, didn't stand out.

Rewatch Value: I might rewatch it someday but I think the rewatch value is just ok.