Well it's some gotten some good reviews so far...
92% with 12 reviews.
Caught a matinee for this.
It's a pretty tense little thriller and part of me likes that it's pretty simple, but it's almost too simple. Great concept, but I suspect many will find it somewhat unsatisfying at a very quick 90 minutes.
A second viewing may help clear up who was lying, various motivations, etc.
For now I give it a 7/10, and a modest recommendation if you find the premise interesting.