I actually enjoyed it minus the...

Horrible CG demon pterodactyls, bulls, worms and whatever other creatures. I did enjoy the survival aspect that part was actually much better than I thought.. It was believable that they were trying to survive, I like how the shelter was packed then the next one fell and they had to find a new shelter, all and all I liked it. If they would have kept the survival aspect but made it a different apocalyptic theme the movie would have done better