Philip K. Dick would be furious if he saw this latest adaptation of one of his stories. Things that shouldn't be explained are (e.g. the future machine sees into the future with a really powerful lens that can see around the curvature of the universe... THEN HOW DOES IT SEE INTO BUILDINGS?). Things that need explanations (like why people don't pull the trigger when they have a gun pointed at their enemy) don't get explained, probably because there is no rational explanation.
Every cliche in the book is on display here. The jocular banter between people is as bad as any 70's cop show. The action sequences are tired and overblown. In one ridiculous scene, just before the protagonist is set to die, a dove flies in through the door leaving the audience to wonder WHAT IN BLUE BLAZES?!?!?!
Hardly any of the main characters come off well. Uma Thurman looks about 50 years old for some reason. Ben Affleck can't act as usual. The scientist from Terminator 2 is in this playing some kind of bad-guy good-guy or something. I didn't bother thinking too hard about it.
The sad part is, I could see the brilliance of Philip K. Dicks story poking through the garbage once in a while. The premise is ingenious, but unfortunately every time it peeps its head out, John Woo takes a massive dump on it.