I originally had this on video and loved it, but decided to upgrade to DVD for the extras and commentary. These were all more than fine, especially the hilarious band biographies written by Kenny Hickey. (For an example of Type O's unique brand of humour, see the T-shirt slogan above.)
That said, I found that compared to the video the sound quality of the DVD edition was poor in places (specifically, on the sections featuring interviews with the band members - there was no problem with the music videos).
Thinking about it, the way the chapters were broken up was bit strange. It would have been nice to have been able to select the music promos individually, with other chapters in between, but this is a minor quibble.
For fans of the band, the video version was a four or even five-star offering, but I'm afraid the DVD only merits three.