The acting was awful, the dialogue even worse. Whoever wrote the script hasn't seen a sci-fi movie in his life. The characters were 2-dimensional and were portrayed as mindless drones with the IQ of children, are we really meant to believe that an officer of the law wouldn't be able to see the obvious right in front of him?
The "special effects" were something right out of BBC's Chucklevision.
The premise of the movie its self, however, the bare bones idea behind the movie was good and solid, a great movie COULD have been made out of the premise with a little research and a little thought; and much better dialogue.
The movie is just too unbelievable to enjoy for me, the biological science behind the creatures is just ridiculous.
If this movie had a better writer for the script, and cut down on the cringe-worthy dialogue that made you wanna smash your own face in with a frying pan it probably would have been OK.
As it is, however, I turned it off after 40 minutes.