We had a great stay at this apartment in Milan. We had four guests, including myself, and it easily accommodated us. The double bed room was very quiet; the other three rooms look onto the street and you can hear the noise. A light sleeper might need a white noise machine. Overall it was very quiet.
The apartment had all the amenities we needed (including air conditioning!). You have to be careful about using too many appliances at once or the power can turn off. That is an Italy issue not specific to this apartment.
My only issue at all was the check in process. We had to fill out an online form with drop down boxes that was tedious and time consuming. Italy regulations require hosts to record information for their guests, but the other places we stayed just wrote it down on arrival.
It's a very quick walk to the bus stop that goes right to Duomo. The nearest train station is about a 5 minute walk.
There's a cute coffee shop right next door, and there's a grocery store about one block away.