So, I just finished watching Exile on Amazon Prime (because it looked interesting, and I'm still feeling kind of broke after this summer). Quick take? I liked it. I liked it a lot.
The reviews I read described it as a movie that makes up for its flaws by doing some interesting and unusual things very well. And I'd basically agree with that.
First up: genre. The film falls under the general category of "Lovecraftian Horror", with both some body horror and some touches of cosmic horror as well. This is a hard genre to do well, because (among other things) it's really hard to have a satisfying resolution when humanity is at best the pawns of vast forces far beyond our control, an at worst utterly insignificant to those forces. Exile handles this by keeping the scope somewhat smaller; we're not in Great Old Ones territory here, but something more on par with The Colour Out Of Space.
In some ways, it's a coming-of-age story, about the teenagers in the isolated desert town of Sunderland -- and by "isolated", I mean entirely surrounded by an electrified fence topped with barbed wire, with only one man authorized to leave town so that he can buy supplies in the outside world. The town is entirely dominated by The Angel, which "fell to Earth" some ten years previously. The adults of the town have all been "evolved" by the angel, a process which appears to grant them access to its eldritch wisdom but also seems to leave them vaguely lobotomized, at least some of the time. (The driver who leaves the town is the lone exception; he communicates with the Angel, but has not been evolved by it.) The children are taught to worship the Angel, and when they come of age they are given a choice: they too can evolve, or they can Fall and go to live in the wasteland outside the town (but still inside the fence).
Our protagonist, David, finds neither choice entirely satisfactory, and that's where the real conflict of the movie begins.
It is, in a lot of ways, a B movie. The acting isn't spectacular (though it isn't horrible, either) and the CGI is pretty low-quality (though this is mitigated by the fact that the movie uses it sparingly). It drags in a couple of places, as the kids struggle with concepts that the audience will already be quite familiar with. Overall, though, it works: it provides a strange vision of their existence, isolated and trapped in a town given over to the service of something entirely other, which can appear at any time to dispense justice according to its own laws. It's both disturbing and memorable, which is really about all I ask from horror movies anymore.
And if you're on Amazon Prime, you can watch it for free. So if that sounds like it might be up your alley, give it a shot.