The apartments are beautiful. The contact to check in was easy. We had apartment 3, and it is on the road, so you hear the trams. The trams did not wakes us, but just be aware they run till at least 11pm.
If noise was an issue, request unit 4.
I would stay there every time I was in Milan, it is a great apartment, close to tram, train, bus. There are also lots of restaurant options close by.