They are closed often, so make sure to call before to make sure they are open.
The most authentic Neopolitan pizza (sorry, Tony's in North Beach) in the city...the pizza oven was flown in from Napoli and the owner/proprietor makes all the pizzas himself. Small menu with classic pizzas only, sparse decor, long wait on weekends, but worth it for quality pizza.
So simple, it's pretty much elitist. Just pizza -- no apps, no desserts. But the pizzas are fantastic.
Freakin awesome pizza in a very unique setting. Totally digged the blasting opera music!