I have an old laserdisc copy of this documentary and can vouch for its quality.
While it's NOT a complete history of comics, it's a good summary for people who want to learn general comic book history and become familiar with some of the great names in comic book history.
I'm glad to hear that the extras which existed on the LD edition have been ported to the DVD version. People will enjoy the comics extras and be transported back in time to when these concepts and characters were new while reading the old comics.
Recently, the History Channel aired its own documentary on superheroes, but the older Comic Book Confidential still blows the newer documentary away. To top it off, the History Channel has only offered a DVD-R of its program and if anybody is familiar with DVD-Rs, you know they aren't as professionally produced as a standard DVD and lack the chapter stops and extras most of us expect as standard requirements for a GOOD DVD!