I've been meaning to watch Coherence. I was going to give it a go when it was first released, but the trailer looked really silly. I've seen some great reviews for it since then, though. Going to watch it right now!
Update: Terrible movie, even worse than I expected. I got everything that was suppose to happen, the inconsistencies as part of the house/characters "alternate realities" and the cat theory, but it just didn't make a good movie, as least not in this particular instance. I was kind of over it an hour or so in, and just wanted the whole thing to collapse and be done with.

Sorry, but I'm not a fan.