I am a sucker when it comes to sci fi movies about time paradox and aliens.
This movie explores very interesting topics, its well acted, pacing is good, keeps you invested, doesn't become boring.
Believe the hype in reviews, it is solid movie that nobody talks about.
I would go even further and say I would enjoy a sequel movie exploring origins and purposes and etc
It is really worth your time. I don't understand why it has low rating. Yes it is budget sci fi movie, but i think the story that's most important and not the cinematography and cgi.