Saw it last night. It was pretty good. I feel it should have been a bit more frantic in parts. Because of the nature of the plot, it never really felt out of control, though I could give them that if that's what they were going for. I also thought all the communications chatter was a bit over the top, but that's nitpicking.
Regardless, good film, nice twist ending, decent acting, especially from Hutton. It won't break down any walls, but its certainly worth watching. Left me wanting a sequel, of all things.