Well, I just watched the finale and I am so emotional right now but as I don't agree with other reviews, I will try to write rationally and talk about this series.

So first of all I can't say that this is what everybody likes and It's totally up to you and your favorite geners. If you like thrillers, mystery and the most important one, you don't have any problem with political scenes which can be boring to some people ( not me actually ) , this is for you.

The first 4 episodes are literally disappoing and honestly you don't have to expect that much. I was about to fall asleep while i was watching the first episode?. But but

From episode 5, everything gets better and better and you suddenly see you have watched all the episodes and you are shocked by every single thing that has happened and you can not even believe this is real..

I really admire the story and as this is the first series that is written by the writer and It's her/his ( sorry i don't remember ) debut, It's so great and thrilling and woow I don't know.

The most important one: Jisung has done a great job acting these two roles. The last episodes that we saw lots of scenes that the twins were together, it must've been so hard for his to play both roles at the same time and talk to himself but he did that perfectly and he is literally one of the best korean actors I have even seen and I have decided to watch more series from him ( Honestly I have only watched Kim Suroo and this series )

Finally, If you like this genre, I recommend you give it a try and wait a few episodes, It will prove itself to you.