My boyfiend and I stayed in Francesco's place for two nights and loved it! Since we didn't have much time, we wanted a convenient location and this was perfect for us. This apartment is within walking distance to train, duomo, sforza castle, and right next to a subway entrance. We didnt even use the subway because everything was so easy to walk to. Francesco was very easy to communicate with while planning our trip and even gave me directions from the airport. He responds very quickly to emails. We never actually me him, but the building guardian was also very nice. The courtyard was peaceful and the apartment very quiet at night. We enjoyed the wine and water Franceso left for us and loved the modern bathroom and kitchen features in a charming old building. The apartment is very clean and seemed pretty big for city standards.
I would definitely stay at Francesco's again and recommend it to friends traveling to Milan, we felt very comfortable at his place and loved the convenience.
I would warn taller people that the lofted bed area is quite short. We really liked the lofted aspect and didn't mind the low height, but anyone more than 5'2" will have to stoop a little.