The characters are all over the place. There was nothing much in the way of in the way of introducing them, but little clues here and there, and I still don't get how they all ended up in this movie. I didn't want to care about any of them.
Their motives are blurry at best until way past the halfway point, and even then they're weak.
Special effects were interesting red, or green carbonated blobs thrown in for some reason that I suppose were to add some atmosphere, but failed.
In the abandoned lumberyard scene: There had to have been something to cut through the chain, or tire in one of those trucks.
The ending did nothing to resolve any of the questions I had from the get go, aside from the aforementioned motivation. If I had any idea of who these people from the start, it might have been a stronger ending.
Will not be watching this again.