Very busy place, but they had a table for two as we walked in. Service was a bit slow, but the waiter was very busy with other tables - the place was jam packed. Food was lovely, authentic Italian and portions we could actually finish..... apart from the vanilla ice cream which can only be ordered for two. I believe this was made at the time we ordered. It was a ridiculously huge portion, which after a big meal I imagine few could finish! It was lovely, though creamy and smooth.
There are lots of places to eat in Naples, but I would recommend this one, although probably best to book ahead.