This Drama is different from anything I have seen before and that's a good thing.

I liked the characters and thought it was great that they weren't just tools for the main characters, they have their own good story, highly connected to the one or other character + the story.

Now the story I thought was very good but there were some plotholes I noticed in the end and generally, you could slowly see the tropes from other drama, so I have to say that I liked the first half of the show much more but that's doesn't mean that the rest was bad, no no, it was still amazing.
Let's also not forget the importance of this Drama related to todays political debate and human rights.