The flat is perfect for a couple, it is well-designed, comfortable and has everything needed to stay for a long period of time. Internet (WiFi) is also great. It was quite a good surprise for us that it had heating (Milan in winter can be really cold) and dish washing machine!
It is a bit far from the city center, however, there is subway station 5 minutes away, and it will take 20 minutes in total to get to Duomo.
Rossella is a super friendly host. Highly recommended!