Stefano's apartment is as spacious as it looks in the photos and is just as quiet as described. It has everything you need to cook a meal and even has a dishwasher and a washing machine although we didn't end up using either. Its equidistant from both Milan Central train station and the historical center of Milan aka where the Milan Cathedral is located (the Duomo) so all in all its a good place.
My two problems with the apartment were that the check in process was not as seamless as it could be. Stefano never clearly indicated which apartment was his and the apartments didn't have any numbers in the building so once we got into the building we didn't know where to go. After asking someone we figured out that his apartment was on the top floor (the 4th) and was actually a walk up, involving 8 flights of stairs to get up. After our day of travel this was he last thing we wanted to do and I would have preferred if that was more clearly indicated before I booked the apartment.
All in all the apartment is nice but for my next trip in Milan I plan on doing more research and staying elsewhere. Thank you!