This looks like fun. I just watched the trailer (intrigued by your review). Last line on the trailer is, "They're watching". Ok, so I'm ready to be scared. From your review I'm guessing this may hit all the traditional extraterretrial tropes, but also strike out quite originally on its own.

If it gets too scary, I'll just skip ahead to the end to find out what happens. Then I'll go back and watch the rest of the movie. That's what I do when things get really suspenseful.

I just checked: I can watch it on Amazon Prime with a 7-day free Sundance Trial.

Thanks for the recommendation.