If you've enjoyed other movies with Dean Cameron (the Ski Schools', Summer School, Men at Work), then this one will have you in stitches. You've got to love Thomas Dolby ("She Blinded Me With Science" singer) AND Tony Basil (of "Hey Mickey you're so fine..." fame) dating the movie and giving it an awesomely hilarious 80's tone.
In short, Rockula is thoroughly entertaining if you are a fan of 80's cheese.
This movie was made knowing it'd be cheesy, which is why it bugs me when people give it bad reviews. That's like giving a science fiction movie bad ratings because it stunk as a comedy. As a 'B' movie--what this movie was meant to be--there is no question this movie ranks up there with the best of 'em.