Excellent recording (October 8, 1980 live @ The Civic Centre, Hartford, Connecticut, USA), from one of the many specials of the American radio King Biscuit Flower Hour.
The Sabbath were experiencing a second golden period in those years, and it shows: Neon Knights and Children Of The Sea are spectacular, Heaven & Hell splendid, Die Young a real missile.
A bit less convincing War Pigs, personally Dio never convinced me when it came to Ozzy’s old pieces, so the opinion is entirely personal.
Iommi proves to be amazing, even if here and there he misses a few notes, but that’s absolutely not a problem: his sound has such strength and energy that goes beyond simple technical skill, his taste and creativity are absolutely brilliant. There are very few musicians who can afford such freedoms. Every time I listen to him, I'm more convinced that he's the most underrated guitarist of all time. Solid Gezer Butler.
Dio was in fantastic shape, and you can hear it.