I've always been on the fence about the song, the docu, and, well, everything about this song!
First, it just reeks of rock-star excess. The album and docu cost more to make than any money ever made from the project. Dio would've been better off just sending the $$ to some charity.
Second, the lyrics basically state Boo hoo, it's hard to be a rock star. What does this have to do with helping starving children?! Even as a rock fan, I detest songs that whine about how "difficult" it is to be a rock star.
Third, the appearace of Spinal Tap as actual living people immediate destroys any heavy metal credability the project would have. To have the actors as themselves ... maybe woulda squeaked by. Maybe. But to have fictional characters involved? That smacks of a kind of cynical ironicism or outright stupidity that I don't like.
The solos are OKAY, certainly not the better than hearing each guitarist in the context of their own band.
In the end, the whole thing comes across as being disingenuous and silly.
People watch that docu just to make fun of it. Those people need to be paddy whacked!
