I mean, it all can be boiled down to what the anthropologist said in the second episode "is it effective"? As a TV show, it was just okay with some stories and stock footage to fit the general theme.
While it does offer a compelling package but it suffers from a major issue and that is the repetition between the 4 leads. It really needed to offer more variety for its theme. It would also help if the drama gave focus to other girls than Yeon Ji. The other girls were mostly given snippets.