I know there are tons of other great pizza joints in town, but the Z is ranks very high on my list.
For starters, I used to work in the Qwest building less than a block away so I have a plethora of experiences with this location...and all good things to say about this particular loc.
They're always on time for one. I'd call in my order before lunch on a personalized pizza and it was always waiting downstairs in the lobby no more than 25 min later. They always got my order correct, although sometimes I'd get kinda topping crazy. I'd add like 8 toppings and they always get it right.
Zero complaints with prompt service here. I tried a few other locs around town and it's whole different ball game. So take this from me that this is the solidified location.