Overall:
I've been to Il Padrino's (aka "Pope Pizza", as the man has made pizza for the pope) a few times - always on a Tuesday night for their half price pizzas.
Not surprisingly, the pizzas are all I've had. They're great - all authentic woodfire oven with nice toppings... Some simple pizzas, some with lots of ingredients - all of them very nice.
The prices are a bit steep if you're paying full price (~20 each), but the man is a world renowned pizza chef, so it's to be expected. He also looks like Mario, of Nintendo fame.
The cafe itself is a little small, bordering on cramped, but the walls are adorned with lots of interesting things to look at.
Service isn't great - I'm not sure if they're annoyed because we only come in for half price pizzas and stick to water for drinks, or if it's just the naturally brusque manner you get in many European restaurants. It's not terrible or anything... just don't expect a whole lot of pleasantries.
Anyhow, if you're in Northbridge (particularly on a Tuesday night) and want good pizza, give Il Padrino's a look.