Checking out some reviews, I decided to look into the select few who didn't like the film. Most seem to say it's just to dark for their tastes, but
this Washington Post review maanged to explain why they didn't like it structurally and thematically. Oddly enough, I agree with every grievance he has with the film. However, I simply liked these things he didn't.
For example, he seems to think it's a generic thriller, with no character development, and while accepting that and being happy with a well put-together chase film he felt cheated when they didn't show the pay-off (the Anton/Moss showdown). I completely understand his annoyance, but simply like that very choice. No real explanation. I just liked it where he didn't.
I thought it was one of the few negative reviews that was acceptable.