I'm a little surprised at the over-exuberance of some people with their reviews of this movie. I actually watched this movie based on the reviews here and it was incredibly disappointing.
I like Arnold, not a great actor, but he is entertaining and I like mindless actions as well. This movie has some good actors in it, however the script was pretty bad. If you watch this movie, download it, don't pay for it. You'll thank me.
BTW Mireille Enos was the worst actor in there by far and most all of the characters were annoying as hell.