I thought to was one of the best kdramas of the year from me. The storyline wasn't dull and boring nor was it predictable. They kept giving you plot twist after plot twist, some which I couldn't even see coming. I found that it always had me at the edge of my seat and always anticipating more. It was wonderfully executed and the stars all acted so we'll together and the scenes were smooth and believable and truthfully I don't rewatch shows but I can definitely see myself rewatching this one. The only reason this isn't 10/10 was because the last episode,even though it was almost 2 hours long, I felt as if during the last half they kinda rushed certain things and didn't give it the justice these scenes deserved and also things somewhat didn't make sense at the end as to why it ended up that way. It wasn't a sad ending and I'm not giving out spoilers but when/if you watch it you'll see what I mean. But definitely worth a watch, a great show