I've dined here numerous times (since I live a 2-minute walk away) and consistently enjoy it.
I usually order the whole grilled spigola and hubby usually gets the zuppa di pesce (mixed seafood in a delicious broth)...both excellent choices. The calamari and pizzas are also great.
The decor is sophisticated yet cozy....a perfect ambiance for an Italian bistro.
Even on a block with two other great Italian options (Seven Numbers & Ferraro), Doppio Zero is a welcome addition.