I've lived in Phoenix area for 20 years and the Super Sicilian is the best sub in the valley. This family owned business is no frills and little has changed. The owner and his son run the shop and you might see one other "hired help". Don't be surprised if you have to bus your own table before and after eating. Alley parking limits the crowds but don't expect quick service.
I've never had anything but the Super Sicilian or Italiano, neither will disappoint.
Casual atmosphere.