Excellent food and relatively quick service. Their pasta is great, as are their pizzas. Dinner will set you back about 15€ a head, which is expensive for Nairobi.
This joint gets busy around lunchtime and even busier in the evenings. The Osteria is the favourite lunch time hangout of the legal fraternity and for the well-heeled professional crowd of Nairobi. Parking is sufficient at lunchtime but gets rather packed in the evenings when the Casablanca club next door starts jumping.
Source: an article about the restaurant