In 15 years, I've written approximately one review. IMO, though, anybody thinking about this movie needs some warning.
The acting is bad, to the point of being painful. And it wasn't just one actor; every one of them seemed to be performing the art of Reciting Lines. The writing didn't give them very good lines to recite, either... and on a larger scale, the plot was uninspired and predictable, the premise thin and nonsensical.
Directing-- I'm not sure there was any. Editing-- there WERE a couple of unnecessary "Family Guy"-style interrupts that added nothing to the film. Two of them. Just jarring little "what the **** was that?" kind of shots. Overall, the entire film was of a par to something made by promising middle-school students.
My wife and I were increasingly dismayed watching this, until we started MST3K-ing it. Ridiculing it made it tolerable, and somewhat enjoyable in a sarcastic way.
But all this is like reviewing a children's book for its literary merit. After the movie was over, our 7-year-old son said he really liked it and thanked us for "making" him watch it. And since I rented it thinking HE might find it interesting, I guess it served its purpose.