We spent a weekend in Milan and it was great to stay at Andrea's place. He is very nice and easy-going. His flat and the guest room are comfortable and full of interesting books and vinyls. In addition, the location is perfect: very close to tram/bus stations (but a walk to the duomo takes only 20-30 min - a very delightful stroll), an interesting and lively neighborhood.
Highly recommended for rock and roll spirited guests.