Bad Film. Spoiler included I was able to see this film at Dallas followed by a Q & A session with Shane Carruth. Being from Dallas, I was really pulling for this film. I was extremely disappointed.
Since it was made with such a small budget I was willing to overlook a lot of the technical problems, such as poor sound and poor visual quality. However, most of the film is out of focus, the lighting is horrendous, and the boom microphone makes an appearance, but even that I looked past.
A lot of people like to describe this up as an extremely intellectual film because it uses some technical jargon. Basically anyone that has completed 8th grade chemistry and/or read one Michael Crichton book should be able to follow it. It's a fairly simple story about time travel and the overlapping of your future and past selves.
I think that the majority of the reason why people are having trouble with this film is because of the problems with the script itself.
Spoiler
Characters are not developed. Characters are introduced and later forgotten. The entire story is narrated by a character that isn't in the entire film. The man that was going to fund the project goes back in time somehow, but that's never even explained.