This drama has received a lot of criticism, some rightfully so, but others not so much. Let's start with the most obvious one, the ad placements; ridiculously placed (how on earth can packaged kimchi taste as good as homemade prepared kimchi, especially recipes made for royalty??) That's one of the worst ad placements I've seen on a show. It definitely did take away from the show and dialogue, but not too much if you understand that many big production shows need sponsors in order to fund the show. The terrible ad placement is one of the reason I knocked off a whole entire star from my overall rating.

Another reason why I knocked off another star is the time travel theme they had. Any time a script involves time travel, you know there's going to be a lot of plot holes. The plot armor in this drama is quite thick. Especially in the last episode where it was completely unexplained as to why the physics within the realm was changed. There were a few characters that seem to have an impact (whether major or minor) become completely irrelevant to the climax in the finale.

The last 3 episodes could've been better. Lee Lim could've definitely have been better written. Why did he come to obsess over the artifact? Why did he want immortality? Why did he think it was a good idea to expose the existence of the two different universes? If his backstory could've been explained for even 10 minutes, I think it would've completely rounded out his character. The Prime Minister, Koo Seo Ryeong, why did she ultimately desire the artifact as well? Did she really think she can easily come out to Lee Lim and expect him to go "yes, you may get the other half"? Being as clever as they writers intended her to be, they could've at least kept that trait. I was expecting a multi struggle at the end as everybody wants the artifact for their own reasons. The last episode introduced too many details that should've been better explained. How did Lee Gon manage to navigate the realm that connected to different universes? How did Yeong manage to retain his memories of the other world?

But then, why did I decide that the show was worth enough for me to give it 8/10? The chemistry between Kim Go Eun and Lee Minho. Truth be told, I wasn't really a fan of Lee Minho starting out the show. His previous dramas that received a lot of praise, I didn't really like them, partly because of the character and the plot didn't really interest me. But I did feel that he was able to portray a wider range of emotions in this drama, compared to the previous ones. I didn't think about starting the drama when I watched the trailer. But, I was sold seeing how comfortable the cast was with each other during their interviews. And mostly, I liked Kim Go Eun as an actress a lot. There are little intricacies between the different characters of Luna and Jung Tae Eul, such as Luna gives off a more solemn aura due to her upbringing in comparison to Jung Tae Eul. Do Hwan's portrayal of the characters Yeong and Eun-Sop was spectacular. However, I don't think it's fair to claim that only he carried the show, whereas the other actors didn't. The characters that Do Hwan had to portray were starkly different and "simpler", whereas the other characters were a lot more complex to portray.

Overall, the drama was beautiful and the chemistry exists between the actors. However, like with many time travel themed shows these days, there are too many plot holes in the script, which is where a lot of the criticism stems from. Many audience just end up feeling like they got duped of the flow of the plot, including me. But ultimately, in the end, you have to watch the drama for yourself in order to judge whether you like it or not. As I have found myself in many situations disliking a drama that many people loved, and vice versa.