the reason I watched this drama is bc im a fan of nam joo hyuk and shin se kyung, so seeing them work on a project together was exciting. bc of this, my opinion of the drama may be slightly biased (i also didn't read the original story) so take my review with a grain of salt
for acting, i think all the actors were great, including the side characters, esp the antagonist, and comedic relief was provided. however, they definitely could've embodied the characters a little better bc sometimes they're a bit more awkward than i would expect from a god. I've seen a lot of people say the chemistry between the couple wasn't good or there was no spark, but i personally think they worked together really well.
the fault is in the character development which i guess the main characters had some arch, mainly haebak. what i expected was a story more focused on the whole god part but in the end it's just a romance with plotholes with some confusing parts about who's a god and who's not. there was definitely a lot of potential for shin hoo ye's character arch but music wise i really love the ost for this drama esp glass bridge, that ones a masterpiece
overall, i would go back to watch it (i have tried many times actually) i just never finish it once i start rewatching it i recommend it if you like romcoms but don't hold expectations to the fantasy part of the drama