Great location! We stayed in Milan for 3 days and went everywhere we wanted by foot. The suite was very clean, the housekeeper Hans was easily joinable by phone and gave all the necessary instructions.
So that you know, because I did not find that information at first, if you're checking in after 21:00 it is possible but will cost you additional 10 euros.
Otherwise, the only notable problem was poor sound isolation but as the window opens on to an inner courtyard which is silent all the time - it is not a big of an issue.