Coherence (2014): 8/10
This is just too hard for me to explain without making it pointless, and I found the trailer unhelpful (though Nicholas Brendon is one of the actors, and seemed to be based on his actual person, not that such is shown in the trailer other than his being there).
I liked it because it did a lot with minimal budget (it's actually painfully amateur at first, and I'm not certain if it got better after the first 10 minutes or so or if I just got used to it--also don't know if they were also trying to make it as "normal" as possible by deliberately doing it this way or not, as it seemed once the power goes off and they're then in twilight zone land, it's different, like a way to make it FEEL more alien, and also subtly underscore the growing paranoia and anxiety). I think it's well done once started in a way that's extremely rare for time travel and alternate timelines...I honestly don't know if a rewatch would cause me to see a lot more holes in it, or make it appreciate it all the more.
There was some indication that a couple of characters have shifted universes even before the in-universe explanation is given, so that we never actually get to know the "baseline" characters. I'm not sure if this is deliberate or not, but it added to the creepiness of it for me.
Violence, lust, romanticism is minimal, and no real CGI (maybe the comet, I don't know), so that would be a minus for some, but I found it a nice change of pace. Even the horror elements were light, and yet it goes from mildly creepy to deeply unsettling.
But overall, I'm impressed that they did so much with so little.
It actually feels like a classic Twilight Zone episode, one that is meant more to inspire disturbing thoughts on a universe we still know so little about, and if we're even "real" or not, or as good as we think we are, or are the ones the OTHERS should be worried about...just stretched out to an hour and half rather than a half hour.
Still, unlike many movies, I don't think they could've trimmed much without it making no sense at all (or at least feeling rushed rather than little it creep over you little by little, it's not made for jump scares or get the adrenaline pumping).
I just can't believe I never heard of this until recently.