We stayed for a week at peter's apartment in milan. Peter is a very nice man! We arrived much earlier but were allowed to enter the apartment straight away and were given a small explanation of how everything works.
It is a secured apartment with a man who is there every day. There is also an elevator and you definitely need it! because the apartment is on the 7th floor, but that gives you a great view over the city and even the Alps! The apartment is very quiet you don't hear the busy street.
The area is beautiful and close to the center, you can take the tram to the center within a few minutes!
I definitely recommend this stay!