I'm a believer too. The record has some killer tracks. Illusion of Power and Can't Get Close Enough are my favourites.
I believe that Tony Martin wrote the lyrics of Forbidden (the song, not the album) for Iommi. I almost can feel how hard it was to be a singer on this band and do his best. But still, he never was Ozzy, not even Dio. Anything he did was enough.