An interesting film. It is based on a decent idea, but I do not think it was executed properly. I would argue that it would be an acceptable B movie. I would also argue that it is not worth making an effort to watch it. There are many better films in the genre.
The main advantage of the film is to make the viewer appreciate good films. Because this is not one of them. Saying that, while it started poorly, it improved and finished better than it began.
This is best summarised by its trailer. Watch it and you will not need to watch the film.