Firstly, I would recommend going into this show blind. Take the gamble, go in without expectations and see what it has to offer. There is more to it than meets the eye. From the poster and synopsis I'm sure various tropes would jump out, that obscure the unique elements within this drama. I think it's unique work within it's genre.

Hwayugi, 49 days, Goblin are excellent examples of the luminaries within the genre, and thus it is in good company.

Very few Dramatic Romantic Comedies as are philosophically ambitious as this, and while I don't think it succeeded they accomplished something special and unique that is worth celebrating and talking about.

One will quickly pick up on the excellent acting, strong start, beautiful music and camera work; most will enjoy the tight scripting especially in the early part, and the authors skill in setting up his/her story. These I'm sure most reviewers will highlight and rightly celebrate.

I'd say the work of the lead actors shine in this drama. I commend them. As well as the director. They must have worked hard. A large part of why this drama just works despite many other "inter-species romance" on offer.

It's ambition is in it's merits as a theodicy (why would a good God allow evil); exploration of love as agency and sacrifice. For one, the divine in this work is very much like what we experience in the real world. A hidden omnipotent mind, other wills are subject to and are incapable of overcoming. Their agency grants them choice, they can choose to submit or choose to defy but it will be according to the will of the Divine mind, who will do as he deems fit. "Divine hiddeness" and the "silence of God" are rare theological concepts seen in Korean drama. On the flip side the anthropology has some question marks. As a work of fiction it works well for the story. I feel it took away from the quality of ending we would end up having.

Theological consistency is rare in supernatural dramas, so this will be refreshing for the philosophical or theologically oriented.

But for the rest of us who watch for the joy of story telling, crying and celebrating with the characters will feel an attachment to don't let the philosophy/theological stuff bother you. They are only part of the setting, and world building helping the story make sense; and for us to understand what the characters are fighting for.

All in all, this is a drama that gets really close to 8.5 without being an 8.5 drama. Excellent work and quality all round. A work I have no qualms recommending to others as worth your time and emotional investment. Excellent acting, awesome music , competent script and director giving us a good story.