Things DAYS has and does well
- Beautiful scene, romantic, beautiful film color
- The soundtrack is so good, any song can become a hit, my favorite is Baekhyun's song "U"
- The acting of all five actors is good, especially Seo In Guk and Park Bo Young, Lee Soo Hyuk is also quite interesting.

What DAYS can't do and does very badly
- Script

I can say this is the worst script among dramas I have ever watched, lack of investment, lack of imagination, lack of sophistication, lack of logic, lack of empathy even than the scripts of low-budget makjang dramas with hundreds of episodes. After this film, I understand more deeply the art of telling the story of a drama, it doesn't have to say all the philosophies that the it convey, the writer should give the viewers the chance to feel. It's philosophy will present itself to the reader, not the writer trying to fill it in the audience's brain.