Marco's place is a recommendation! It is just 5 min walk to the closest tram and from there would take around 10 min to Duomo. Also, near the tram there is a supermarket which is so convenient for us. Marco is also a wonderful host who responds to us quickly and were at the house to check us in and to explain everything. The place is clean and the same as in the pictures. Kitchen is well equipped and functionable. Marco gave us 2 sets of key which helped us a lot as we traveled 6 people.
For anyone coming to Milan, Marco's is the place where you should stay!