I quite like Trashed off that album as well.
It's not a bad rock album, It's just a terrible Black Sabbath album if you see what I mean.
Oh and here's some background on that awful album cover..
The album cover, which featured the image of an infant with horns and vampire fangs, was designed by Steve Joule. He also handwrote the lyrics that appear on the inner bag. The deliberately lurid design was submitted by Joule in a vain attempt to be rejected from this design commission, as he was also retained on a lucrative contract by Ozzy Osbourne's organisation for his sleeve designs. To Joule's horror and surprise, Tony Iommi and Geezer Butler approved the image for the album. Gillan and Ward were not present when the decision was made, though they later noted that they hated the finished cover. Gillan reportedly hated the cover so much, that he threw a box of 50 records out a window. Joule reports that he was drunk and high on speed when he drew the finalized designs for the album.