For it's length and ambitious plot, this drama was well done. The production was high and the acting was great, but it definitely lacked in some aspects. For me, it was mostly just the villain. He was so basic and boring. The world itself could've been expanded on, but I didn't really care because the plot itself was so straightforward that the audience didn't need to know much about world.
Every other moment of the show was just me screaming about how good Kim Woobin looked. So it was a real treat just for me.