I'll be honest, I left the last two episodes of the show on hold for a long time because I slowly lost interest in the story. However, I'm sure this is the best drama I've seen starring Song Kang lol. If you know, you know.
I think I didn't enjoy some of the fantasy aspects of the show, but that could be a personal thing. Also I never connected deeply with the characters, which could explain my lack of interest towards the end.
I would still recommend if you enjoy fantasy dramas.