I stayed up last night to watch it and I can only say it's got better with age.
Such an AWESOME film that I only happened upon while channel surfing, it's one of those films, like The Green Mile, Shawshank, The Usual Suspect, etc, that, once you've started to watch, you can't turn over.
I remember watching it in the cinema when it came out (it was the only thing we could do while my mate was getting his clutch changed) and he came out saying it was nothing special.
NO SPOILERS here, but if you've not seen it, you've missed an absolute classic.
I'm sure that if it were not for the big names that took part, this would have been one of those sleeper/cult films, but the names really do deserve their star billing.