This drama indeed has some amazing characters, but the story feels aimless and unfinished. I loved the two noona romances, although Tami's in the last 1/3rd of the drama was quite annoying. The interactions of the 3 main women were also quite entertaining, it's quality bromance. Having binged this in 3 days I feel that writers did some pretty obvious character personality adjustments in between episodes, which seemed to have made the flow of the story inconsistent. Also there is quite a bit of repetition, some scenes and issues are brought up & discussed in a way that reminded me of time travel dramas. This show is first and foremost a procedural drama, but the happenings in the Search Engine industry were not all that interesting, especially in the second half.

Had they've given me a proper happy ending, or at least an open ended ending that shows some hope I would have rated this a point higher. To reiterate on the ending, none of the 3 women have a real hope to keep their current partner. Tami reconciles with Morgan in the last episode, but realistically nothing is resolved and they are doomed to fall apart again. Song Gagyeong's happy ending is a successful divorce with a husband she clearly had a strong bond with..
As for Scarlett, what are the odds that after one month of being together her relationship can survive another 18 or so months of being apart. I guess the Melodrama tag on Wiki is completely justified. :)