Nothing new, with less cast than Coherence.
This movie was good, well shot, and all around good for the genre. I think I enjoyed it because despite it clearly being a multiple dimension film, if you removed that and only thought about it as a weekend getaway with a husband a wife and a friend trying to move past a traumatic event, and that everyone is using psychology to try and break through to each other, it also works.
The ending though was just a bit too cookie cutter for a happy ending that didn't need that very last scene. It would've been just as good with everyone moving on/accepting what had happened.
One let down was that a piece of string was somehow going to help them travel through dimensions in a repeatable fashion. Sure if she had only followed the string to follow him, I'd buy it. But the moment he came back to her and wrapping the string up, they had no way of guaranteeing which reality they'd emerge in.
