Yeah i've seen it. It's by no way the train wreck most critics made it out to be, but is definitely a bit of a let down compared to Donnie Darko. People said it was too convoluted and it made no sense but that's bollocks, there's a very understandable story at it's core. It has a really nice dark dystopic tone to it. The future world it presents is not too dissimilar from ours, and feels very believable. In many respects it reminded me of Kubrick's A Clockwork Orange. Definitely worth a watch if you fancy something a bit different and don't mind having to think a bit.