"...this film imagines its viewers to be smart, possessed of a decent attention span and game for a challenge. It doesnâ€™t happen all that often." This doesn't make it a bad movie; rather it makes most viewers a bad audience. Too many movies cater to the lowest common denominator. I for one am thanful this movie does not.
Time Out says
Thinking inside the box: in an American garage, two jargon-jawing techies are working away on something mysterious and potentially revolutionary. It’s best to go into this brain-bending debut without knowing much more, so we’ll just tell you that Carruth, a former engineer with little prior filmmaking experience, shot this audacious time-travel mindfucker on Super 16 for some $7,000, and the thrilling, rough-hewn result provokes extreme love-it-or-hate-it reactions – it’s temporally gnarled, ethically engaged, and altogether batty, and it amply rewards patience, engagement, and repeat viewings.