I've been staying at quite a lot of accomodations with Airbnb so far, and Dimitri and Marcello are the most helpfull and friendly host ever!
They gave me a lot of travel tips and made my trip in Milan so enjoyable. We had a lot of laughs all the time, and I ended up staying there for three weeks!
The apartment is located in the center of Milan so you can go pretty much anywhere within a walking distance.
Dimitri speaks four languages including Japanese, which help a non English speaker to stay in Milan comfortably.
I would highly recommend staying at their place.