We stayed in Diego's apartment this week for 4 nights. The apartment is situated in one of the nicest neighbourhoods in Milan. I've been going to Milan for 30 years and must have visited the city some 20 times. Porta Venezia is within walking distance to the Duomo. Take it from me, you don't want to stay in the centre as its too touristy and pricey. There are great restaurants in the area especially 'Calaluna'
Diego's apartment is spacious and has good facilities including Wifi. Its less than a minute to the Metro. Diego (who speaks excellent English) was there to meet us. Have no hesitation to stay there again.