I don't look to this movie (or the Tommyknockers, which gets the same mixed reviews) for the special effects or the best acting in the world. I look to them because they offer insight into our imaginations, something that we tend to lose the older we get. These movies are made to get your imagination pumping, and make you think about other situations rather than our own current situations.

Immerse yourself in the film's story, not in the acting, or the music, or the plot holes that may or may not exist. In the case of this movie, it almost has to be watched in whole to get the effect.

Just my own opinion.