I stayed for the month of January at GianGiacomo’s place. It is situated in a great area, as you have all the shops necessary for your stay on the street (i.e. supermarket and pharmacy), quick access to the trams taking you around Milan, and 5min away from Navigli.
I would definitely recommend this place for a short stay!
However, be weary that it can get very cold during winter as this is an old apartment, and it is not properly heated.