It's good, I really enjoyed it and I cried like a baby bc of Tang Wei's arc. Meanwhile, it lacks time to construct each storyline they showed to us through the movie.
What exactly happened with the woman who created it and her parents? What did Gong Yoo mean to Tang Wei in the movie? What happened with Suzy's and Bogum's arc? Did they start to work out their problems? It left us hanging onto something we won't know and it's kinda frustrating. I don't really care about the sci-fi aspects, yeah it's very fantasious, but like nothing serious, it's still a very touching movie.

And what really happened with the guy and his grandma like???? I get it, she died, but how did the system turned out to be that person when it, at least, should have a personality base? It's confusing.

I really liked the movie, but I wish they worked better with a longer time, it would be better to show about all the storylines they introduced.