The story was pretty standard fare for an action horror film. It didn't really do anything good or bad, but stuck to the middle of the road. My main issues with the plot was it was all over the place, instead of focusing on one set of characters, it constantly switched between the two. In addition to that the plot was predictable and you could see twists coming a mile away.
The acting in this film was actually pretty good for the most part. The actors gave their characters some degree of personality, but unfortunately didn't really get enough time to develop the characters to the point where you care about them. The actors who played the hunters, except for Seagal, really didn't have any dialog. Even Seagal himself didn't have a ton of lines, and was more of a rarely speaking bad ass and I feel it worked for the role.
Overall this is an okay movie, but it doesn't do anything new or exciting. I feel if it had focused on one group, either the civilian survivors or the hunters, the film would have been better. By focusing on both the movie just feels like a mess. It's not bad if you have no other options, but there are better action horror films out there.
Verdict: Average movie that you can skip and not miss a thing.