If you read the book, and you're looking for a good adaptation, don't bother with this. The plot for this movie has been changed a lot from the book, and the art and music don't make up for it.
If you haven't read the book (you should), then really, DON'T watch this. If you haven't already enjoyed the real story, this wouldn't even have the appeal of being loosely related to that.
I highly recommend the second movie Bloodlust, as it captures the essence of the series much better, and is a better movie overall. The original movie is entirely skippable, as the second movie is quite self-contained.