Absolutely terrible.

Rating: 1/10 (17 October 2011)

This was without doubt one of the most horrible movies I have ever seen (yes, even worse than anything Tommy Wiseau has cooked up).
The "plot" (I do not think that it is worthy of that word) has gaping wide plot holes. The "science" behind the plot is absurd; there is no logic present whatsoever (how is it possible for somebody to send text messages across multiple dimensions? How is it possible to exist in two dimensions at once?). Wait a second - I think I'm missing something - how is it possible to even have two dimensions? The "scientist" presents this pseudo scientific feat rather casually, and no time is given to explain how something like that can exist.
The concept that a brain can still operate at the height of what Gyllenhaal's character can in "limbo" is ridiculous. The complete lack of deductive reasoning on the part of the military personnel is also frustrating. If the person responsible for planting the bomb is intending to blow up a second target, then surely they must be alive to do so. Ergo, Mr Bomb man must not have been on the train at the time of the explosion. So shouldn't your first concern be not the people ON the train during the explosion, but the people getting OFF the train? In addition, how can you be certain that the bomber would be on the train in the 8 minute time slot that the protagonist had access to?
However, my biggest beef with this film is not the absolute lack of logic and reasoning, but rather in its completely dull and repetitive nature. The audience is presented with THE SAME EIGHT MINUTES of footage ad nauseam, with slight relief from little dialogues of our dead soldier trying to deduce how he possibly could be existing in somebody else's soon to be dead body. In the case of this film, intentionally repetitive is still mind numbingly repetitive. This has been described as a "thriller", but it's hard to feel thrilled when you know if the protagonist screws up, he can just go back and do it all again.
I'm not even going to comment on the blatant patriotic American self righteous and militaristic war on terror bullshit propaganda "subtly" woven in.
The performance of the acting is okay. Not great, not bad, but okay. It's hard to pay attention to the performance of the cast with the absurdity of the dialogue.
Oh, and the protagonist also walks of with the teachers life in his alternate reality. There is no mention of the morality of this.
Intellectual nonsense, coupled with frustratingly repetitive scenes makes this film a flop. I would rate this film 0 stars, but that isn't an option :( If you have a shred of taste and intellectuality, then I encourage you to save yourself the pain of sitting through this film.