We spent a wonderful week in Marilena's apartment which was absolutely perfect for us. It is located in a very central area, 5 min from the Duomo, and we walked everywhere. It is also close to the bus no 73 which takes you to and from Linate Airport. The apartment looks like it has recently been remodeled, everything is new, the kitchen and bathroom are very clean and functional. Also the bed was great to sleep in. We stayed there at the beginning of July and the temperatures were quite high (30-34 degrees celsius), and so we really appreciated the air conditioning, which is still a rare feature in European apartments. We also enjoyed sitting on the small balcony which overlooks the alley.
Marilena recommended some restaurants (Cantina della Vetra and Zio Pesce) and coffee places (Sal.E Bar) to us, and we were not disappointed: we had some excellent, real Italian food, and some of our Italian colleagues told us later that those places were one of the best in Milan. I also want to emphasize that Marilena is a wonderful host who responds very quickly to messages and provides great advice for getting around and finding coffee places, food stores and restaurants, which is very helpful when you don't know much about the city like us.