I am a big fan of the time travel concept and movies, that is why giving it three stars. Otherwise, I had to see the wikipedia page of this movie to find out what the plot actually was! Of course, I found out, the plot was good, but I couldn't follow it while watching it, and I have followed the plots of all time travel movies I have watched. I can forgive the producer, director and actors because it was a very low budget film, but please don't make such crap again.

It was sort of easy to follow until up to a point. Then it's a struggle. But that's the genius behind it. You're experiencing the maddening with the characters. You're experiencing a downward spiral :-). Eventually more questions than answers. Brilliant film! Loved it! Mad respect for the people that created this film.

With a 7,000 dollar budget and completely unknown actors all-around, Primer is the mere definition of a small-budgeted indie feature. It's also incredibly complicated and technically brilliant considering Shane Carruth's (director, producer, writer, editor, composer, and actor) comprehensive knowledge in mathematics and engineering. Which is one of the things that makes Primer so special, it's originality. It's a nice mix of a Christopher Nolan non-liner structured script, a David Lynch style tone, and the science & imagination of a James Cameron film. For a first feature, I'm not sure I can give a higher praise. Unfortunately, it's not always the easiest film to follow as Carruth rarely ever takes the time for exposition. At the same time a film like this, which already has a slower pace, probably would do worse with several exposition scenes. What the film does, however, is provide fascinating propositions for what time travel could look and feel like. It's not as simple as Back to the Future nor as expansive as Interstellar, but it is very personal. And with a film that mostly focuses on two best friends, the personal approach is obviously beneficial. With all that said, I think the limitations prevent this from being an instant classic. I'd like to see Carruth revisit the ideas and themes and make a bigger budgeted feature. That way, he could make the film longer and more in-depth. Just as a pure sci-fi fan, there's a lot to like about a film that reinvents how to tell a cerebral story in new and interesting ways. Overall though, Primer is an unforgettable film.7.8/10

Half of the dialogue is made up of pointless and monotonous technical rambling that gives little insight to the practical theory of the machine with a plot that lacks content and completely wastes the premise of time travel on an uncreative drawn out sequence of repetitive dialogues. By the end the two main protagonists gave me a headache, hearing the same dull monotonal voices drained the life out of me. Watch this movie if you if you want dementia.