Just (and I mean literally, just) saw this at the Toronto International Film Festival. It was preceded by a really creepy first-person handicam short film (The Eyes of Edward James), which had me shaking even before End started.
Suffice it to say, the film did not disappoint. It helps not to know much about the movie, but the key plot points are: * Death & * The Subway
Canadian viewers will get a kick out of the TTC and Montreal Metro shots (and have a fun time taking public transit home), and pretty much anyone will be freaked out about taking the subway after watching it.
The only complaint I would make is it was about 30 minutes and a few characters too long. There was a bit too much characterisation and conversation, and it slowed the plot down - though I'm quick to add that it never went too long before a scary/exciting part picked up again. If this is going to see major release though, they'll definitely need to cut it - anything over 2h is already too much, and this movie definitely didn't need that extra stuff.
One final warning: It is exceedingly gory. I have not seen so much blood and graphic violence in a long time. And it'll scare you.