Why this movie is enjoyable?

Rating: 5/10 (12 May 2018)

I have to say that at first time I saw the aliens in this movie, I wondered why did I got excited for it!!
As a science fiction movies fan, I would say that I liked it. It have all the reasonable factors that makes it a good sci-fi movie.. which is presentation of an unusual phenomena or event or whatever it could be and then the viewer should sit back and watch the effects of it with minimal predictable "smart" interference that usually found in sci-fi movies.
This movie is not about aliens.. it is about humans. The aliens are just means to describe human behaviors. Most movies that involve alien race presence would of course showcases human behaviors toward the unknown.. but here and in this movie the aliens are not "unknown". For some reason an obviously more technically advanced alien race got "trapped" on earth. Up to almost half the movie run time, the presentation of aliens was through TV reports and interviews that documents the life of aliens in the restricted slum-like area after so many years on earth. On the second half of the movie run time, that's when the enjoyable part start.. the sympathy toward the aliens reflected back to be a sympathy toward human race for its cruelty and selfishness.
I would recommend this movie to every science fiction genre fan.