Just rented this over the weekend. Truly as horrible as everyone seems to think. Bad cgi. Actors walking on a treadmill (or "moonwalking" brilliantly) in front of bad green screen effects. Bad dialog. Bad acting (with Ben Kingsley being the possible exception).
Logic? What logic? The one grossly obvious lack of logic, in my opinion (and perhaps this was also a lapse in the original story)was:
Very disappointing as I was looking forward to seeing this. Very promising premise that unfortunately did not deliver. To add insult to injury, I made the mistake of watching "Flightplan" the next night. Just wasn't my weekend for watching movies...
Jimmy