I stopped in with a friend on a recent Thursday around 1AM. The place was pretty empty. We had a Margherita pie which was a little soggy, but not bad for $10. The real treat was the "Go To" cocktail: Square One Cucumber Vodka / St. Germaine / Fresh Lime Juice / Ginger Ale / Cucumber / Fresh mint / Angostura Bitters. At $13, it's a bit pricey... but delicious nonethless.
I imagine traffic will pick up on the weekends. Not a bad option if you're craving pizza late at night and a simple corner slice won't suffice.