I would highly recommend staying at Vasco's place, which is accurately described and photographed on the Airbnb site. The apartment is centrally located being an easy 20 minute walk to the Duomo area and also the same distance the other direction to the trendy Navigli area. It is on a street with tram lines and also next to a taxi stand, and is conveniently surrounded by shops and restaurants. The apartment is a compact, well-equipped place with air conditioning which is important in the summer months and also a strong wifi signal. It was very easy to deal with Vasco, who was a responsive and hospitable host. He personally helped us settle in, and was ready to answer any questions we had on the immediate neighborhood and Milan in general.