In short, Mario made our stay very easy. He was accommodating for our check-in time (we had to arrive a little later than 6pm) and he was very communicative. The building is very nice with a working elevator. The apartment is clean, functional and has all of the basics. It was also easy to get around the city because the apartment is right next to the M5 subway line and near many restaurants and shops. We will definitely come back to Mario's place the next time we are in Milan.