I enjoyed this drama a lot but I'm not as enthusiastic about it as a lot of people here who rate it a masterpiece. It's a solidly good drama with an intricate time travel plot that miraculously doesn't unravel despite some loose threads here and there. The characters are likeable, esp. Huang Yu Xuan, Mo Jun Jie and older Li Zi Wei. The performances of the core three actors are very strong, with a special shoutout to Alice Ke who is brilliant in a double role that requires a lot of subtlety and nuance. The OST is lovely and Last Dance is a perfect song to trigger the time travel sequences, loved that.

Having said that, here's why I don't think SD1D is a masterpiece:

1) The drama is very slow to start. Honestly if I hadn't seen and loved Rainless Love in a Godless Land first I might have dropped after the second episode. I kept going because I trusted the creators.

2) The core couple didn't convince me that their love was so epic that it spanned space and time. They seemed like a perfectly lovely 20 something couple but nothing that special and that causes problems in a story that hinges on their fated love. Having said that, ep. 9 (LZW travels forward in time to woo HYX) made me sob.

3) Chen Yun Ru's villain arc is introduced in the next to last episode. She was a fascinating and complex character, sympathetic and unlikeable at the same time. She needed more development so we could be as invested in her story and redemption as we were in the core romance. I also wanted to see more of her with MJJ because he was such a great character and also didn't get enough screentime as the story progressed.

4) The psychiatrist's storyline ultimately didn't amount to much esp. given how much time is devoted to the arc.

I still really enjoyed this drama and will recommend it to friends.