YWCFTS is a perfect blend of romance, comedy, and melodrama. I love the underlying theme of why humans live diligently when we are all going to die eventually anyway. The writer provided a complete story. I didn't feel the holes that are so common when sci fi, time travel, body switch, etc. stories are attempted. I'm not a fan of romantic comedy, but this was so well done and included enough melo to keep me interested.
Why isn't Jun Ji Hyun in more dramas? I absolutely adore her. She made Song Yi so real to me. I will watch anything she plans to do in the future. Honestly, I'm not much of a fan of Kim Soo Hyun. However, he played Min Joon very well. To me his character was a good blend of controlled emotion with feeling. Park Hae Jin and Yoo In Na as well as the other characters were also good.
The music is pretty.
I will probably rewatch this at some point.
I think everyone would enjoy this drama.