Very good. The instrumentals all are very good, and the concept is excellent. As well as some funny lyrics. Though I think the vocals could do with being a tad faster, and a little more raspy.
And at BluGil
It's called comedy metal. All of Dethklok is comedy metal, they just make it subtle . There isn't much wrong with this song, and simply because YOU don't like it personally, you should at least rate it based on musical skill, and give constructive criticism rather than say "That was retarded" and give it a one.