Delicious pizza. One is vegan by default. Some others can be made vegan by requesting vegan mozzarella. Their website tells you all about the vegan options: http://www.zpizza.com/about/faq
I found the pizza great. We came in maybe a half-hour before closing, so it was nice and quiet, but the staff was great and didn't try to rush us.
The prices seem perfectly reasonable for the quantity and quality of the food.
Updated from previous review on Wednesday July 10, 2013