When it was good, it was REALLY good. But it was just never quite good enough. The mystery was full of potential, the romance was full of potential, the trajectory of the story was full of potential...and it just kind of always fell short. I could see what the production was aiming for and I think they just executed it poorly. I was left frustrated by the plot holes and a bit annoyed with reused supernatural plot devices (This is Goblin and You Who Came From the Stars 2.0, if you've seen Black and those dramas, you know exactly what scenes I'm talking about). I wanted more original material. Having said that, the fact that I’m worked up and upset about it proves that I did indeed love this drama at times (which is all the more reason why it disappointed me so). It’s worth a watch—just check your expectations at the door.