this is a small noodle bar on University Ave in palo alto. The food is good, but a little more expensive than it maybe should be, especially the appetizers. They have great spring rolls and summer rolls, and all their main noodle dishes are very large (which helps to make up for it being somewhat expensive). The service is generally good and fairly quick. Nice ambiance, casual and small, but nice high ceilings give it a open feeling. The pho is just ok. I think it's much better at more authentic vietnamese places, but it's quite adequate at Zao. Their noodle stir frys are their best offering.