I finally got to hear the bonus disc today (though I have yet to get the actual disc - broke as hell).
A GREAT chance to hear a work in progress from one of the best bands of all-time. I'm especially fond of the version of Planet Caravan on here, not just for the lack of effects on Ozzy's voice...but also for the extended Iommi guitar solo at the end (one of his jazziest).
I'd have to side by side comparison them to figure out whether it's the same takes as the albums, but in some cases there are definite differences. For example, no Phaser effect on Electric Funeral and the lack of guitar overdubs in other places.
The one I'm really looking forward to is the deluxe version of the debut album. Here's hoping they finally include the full-length version of Warning that Iommi has been talking about for decades. Plus it would be nice to get some of those early demos like "Song For Jim" and "The Rebel" finally issued.