Main reason I'll put this here is to help people who're split over whether they should simply buy an original edition of this, or the one with the bonus disc.
Simply put, the bonus disc includes B-Sides and extras recorded during the "Skunkworks" era, two tracks ("I'm in a Band with an Italian Drummer", "Re-Entry") were deemed good enough to be put onto Disc 2 of Dickinson's "Best Of", and rightly so. The recording quality is just as good as the studio album itself, and parts of the disc (Mainly "God's Not Coming Back", and "I will not accept the Truth" on disc one) see Dickinson singing similarly to his later 'Maiden days, combined with the Skunkworks style, which works well. "American's Are Behind" is a very odd track, with Dickinson verging on rapping, though it's more talking very fast with a strong English accent.
The live tracks are three of the best tracks from the first disc, and the cover of Iron Maiden's "The Prisoner" sounds pretty damn good too.