Daniel Madison didn't really start to appreciate Angle Zero until a bit after he published the effect. He said that he thought it was a neat idea but didn't continue to work with it. The new release of Angle Z is basically just a master class on the same effect. Learn how to perform it with a signed card, a randomly selected card, how to use Angle Z as a penetration through a glass table, effective locations to make the torn corner appear, loads of information. New subtleties to make the effect significantly stronger, and new applications that you may not have considered. Overall, if you already enjoy Angle Zero, than the Angle Z DVD will have something for you.
Personally, I actually love the Angle Zero effect. I think it's an absolutely killer piece of card magic, pun intended.