Guess what?! I'm the unpopular opinion (again...). Anyway, "While you were sleeping" started so so strong, with beautiful cinematography and griping story, dreamy like. Unfortunately, the cinematography later on appeared here and there only, and I really, really wish that they had more of it, like Goblin. Another plus was the cast. Love the two leads, but Suzy wasn't at her best. Maybe it was her character that was kind of odd and annoying at some point, but it just didn't work. Not that her performance wasn't great, it just felt like the role wasn't for her... The love story and the couples chemistry, moreover, was okay and really good at first, but kind of felt weak towards the middle, picked up though towards the ending. In addition, the soundtrack was perfect! Really good indeed, Scarlet heart quality (you should check it out if you're interested in OSTs). Finally, the cases: they were interesting at first, but they got weaker and weaker, especially as the story focused on the couple rather than them. So, 5 out of 10, not too bad but not too good.