My Review of Movie (Spoilers)
First, its a popcorn movie, not an academy award winning one. Don't expect great acting, set design, etc.
Second, it does pay homage to Precinct 13. Why? Bad guys have no lines. This is similar to John Carpenters Precinct 13 villains. I won't take credit for noting this, as other threads point this out as well.
Third, given the biker theme and the way they dress, it seems to pay homage to Mad Max as well. Once again, other threads discuss this.
Fourth, yes, there are some plot issues. Why talk about the bus drivers incredible driving skills, and then kill him?
Five, action, action, action. At some point, I am not sure when, I started inching further in my seat.
Six, the one deep theme that seems to run through this movie is how people handle being forced to kill another human being. I think they handle this well.
Seven, there are a few distracting issues, such as the endless shotgun ammo. I only mention it because one of the actors discusses counting ammo to make sure they don't waste it. Then, suddenly, who cares about the ammo.
All in all, a fun movie, but don't expect a lot. This is an action movie, low on plot, with some believable character closeness.