Took a chance to watch this series because I'm a fan of Shin Hye Sun. Don't regret anything about it. I don't usually watch historical because I don't really find it that entertaining. But the fusion of modern-ish stuff, fantasy, and romantic-comedy made this well worth the watch. I watched this series with my brother who doesn't typically watch kdramas and he watched every episode with me. We watched as it was ongoing and waiting out every week for the new episodes. It's good enough that we're recommending it to our friends who watches kdramas.

Acting was really good. As expected from Shin Hye Sun (female lead). Her unorthodox character is not easy to pull off. But pulled it off she did. Respect for all those scenes. Basically carried the show for all her scenes. I was embarrassed for her at times, it was that good. Kim Jung Hyun (male lead) did very well, was very funny and did very well on his action scenes. The rest of the main actors were superb as well. Their acting made it that much more immersive and the story engaging. Support characters had their own flair, their own story, and shouldn't be counted out. Just watch them. I liked (almost) every support character in their own way.

Story is very engaging and was spaced out pretty appropriately. It felt like no scene was a filler. Everything had a purpose. I had rewatched episode 1 at least 5 times because I watched it with friends, because I recommended the series to them. I didn't once get tired. I could watch this series again right now. Rewatching value 10/10. Applause to the writers. I know this series had some controversy because of the original work, but everything was done excellently, imo.

Music was mixed with contemporary music, and I gave this a 9.5 star because I've heard more memorable OSTs. This wasn't as memorable by itself, but they all fit the scenes very very well. Didn't take the attention away from the emotions of the scene, and added to it.

If you're on the fence about this series, I'd say give the first episode a go, because the first episode will determine how you like the series, as the first episode is as intense as any other episode in the drama. I've wasted a lot of time rewatching the episodes between the new episode releases, and it was worth it as well. I personally like this series, and is one that those who has avoided watched historical, should still consider. This series will go down as one of my all time greats!