A stylish drama about three adult women and their work and relationships. This is NOT another K-Drama about youth, beginnings and the first kiss . . .

The main action centers around work-place strategy and political intrigue. These plots move fast with lots of suspenseful tension. I was 100% addicted. It's very dramatic while still keeping a touch of realism.

The secondary action is around relationships. The main romance does drag on with 'will they' or 'won't they?', HOWEVER, I loved seeing a fully realized romantic relationship on screen (instead of just tension, tension, tension - kiss! over). They also have a more at ease, physical relationship than in many K-dramas.

The music was the best I'd ever heard in a K-drama set in the present day.

I'm not sure I'd re-watch, since it's set up as a mystery/suspense.

I grade on other criteria ...

Complex Themes - 7
There actually isn't much there, there. Some themes around karma, treating people as how you will want to be treated. How to deal with cruelty, corruption and power through concrete action.
Character Growth - 7.5
The characters are fairly fixed. The one BIG exception : Song Ga Kyung (Jeon Hye Jin). She goes from being weak, petty and cruel to rediscovering an inner strength that was inspirational to watch.
Complex Women/Female Relationships - 10
The show centers around female protagonists AND female antagonists. The men have a secondary role . Not only are women front and center, but they have very complex feelings and relationships with each other. It was incredibly refreshing.
Cinematography/Production Values - 10
Lots of creative cinematic camera angles, lighting, and staging. The clothes and sets are great, realistic with a touch of fantasy. There is a ton of product placement, but that also allowed for the wealthy characters to look and act believably wealthy.