without a doubt it is a series that is totally worth it. It is well written, it has a complex and well developed story and also the performances and the music are very good.
My biggest problem with this drama is that there was never a complaint to the police, when they even had all the possible evidence to win a case and that K. will end up in jail, which I consider very important that it should have happened, I would give an example and it would definitely be what they should do to do justice, it is the only failure they would have. The way things happen to Shin are very realistic and well told and developed, I am glad that a drama has this depth.
It is well worth it and I would definitely recommend it for how well done it is.