Honestly, I think the pacing and the structure of this drama is one its strongest points. With a lot of dramas, they simply run out of plot halfway through, making them boring and hard to finish. This one, however, spreads the plot points out pretty well, so there's always some drama or loose end to look forward to resolve next.

The last episode ties everything really nicely. Other positive aspects are the OST, which is very emotional, borderline melancholic, with a special shot out to Say You Love Me. The acting is also solid. As someone who watched earlier works of Kim Yoojung, it's nice to see her evolution. Song Kang also manages to imprint a lot of charm to a character that might who, otherwise, could easily be considered annoying and callous (at the beginning, since as the story progresses he shows some loser energy that I rather like). The both of them have a lot of chemistry together, too.

The drama does touch on important but delicate subjects, such as domestic violence, class discrimination and child abuse in a way that I can appreciate. Although charcaters like Dogyeong and his mother, despite having done terrible things and facing the dire consequences of their actions, still receive some sympathy in the last episode, after all, they were also victims of and abusive father/husband.

I think the drama has some interesting concepts as well. The way God is portrayed is very interesting and refreshing, as more of a neutral being who's there to acompany hmanity on our journey rather than interfere. Although they play with the idea of fate, I appreciate that the writers also highlight our choices are what makes our fate. The whole implementation of demons and Christian concepts is cool, not something I've seen much in dramas before. The endings the characters get feel very much like some sort of divine or biblical retribution, the "punish the wicked and reward the just" sort of thing, which makes sense with the religious themes.

I had only some minor gripes with the drama as a whole. Honetly, the fact that everyone seems to be made of titanium and simply refuses to die bothered me quite a bit. People are involved in car accidents, explosions, jump from buildings and still somehow survive. Also, I wish the whole demon lore would've been better explored. Guwon seems to be the only demon to exist, except he's only 200 years old and the concept of demons has existed much before that. Also, how come demons were once humanity's guardian's and suddenly became entities to tempt them and send them to hell? What changed exactly?

The female rivalry was also extremely annoying. It's such a tired concept, please. At least Gayoung got a redemption later. I think sometimes the drama makes the characters a bit dumb just to propel the plot forward. Dohee gets multiple attempts on her life, and she still walks around alone just so the culprit can get to her. But, honestly, these negative points are, mostly, minor things and didn't damage my experience much.

Also, can I just say, Seokhoon is a cutie and I'd totally watch a drama where he's the male lead! If the story was about him and Dohee I'd have liked it just the same. At least he got a good ending. The endings in general are very satisfying, I think. So this drama is definitely a big recommendation to everyone!