While there are other masterpieces that may be a cut above, this show is a masterpiece in itself. The story is beautiful, moving and intense, with a superlative screenplay that continuously and well blends moments of hilarity with sad moments, as is customary in K-dramas. My partner and I were glued to the screen from the first to the last second, crying and laughing and living with the leads. Leads who are over the top: theirs is certainly among the most beautiful love stories told in k-dramas. And both Gong Yoo and Kim Go Eun are more than up to the task and incredibly adorable and comfortable, despite the obvious age difference between them. Well described and defined supporting roles: The Grim Reaper and Sunny are for me one of the most beautiful and touching supporting couples seen so far (154 k-dramas completed). The rest of the cast is well assorted and the soundtrack is definitely up to par. It's a show that has seen a huge investment commercially, but well spent, truly well spent. Absolutely worth watching.