I stayed at Francesco's place for a conference and was there for almost a week. It is just as described and appears in the photographs. It was clean and quiet despite being close to the centre and nightlife. There are a number of public transport stops close by as well as lots of shops, restaurants and bars. My conference was at the MiCo conference centre which was easily accessible by taking the metro and approximately 25mins away from Francesco's flat. The Duomo and the Last supper are both within walking distance or public transport.
The street sign for Francesco's place is not obvious as it's covered by a road sign you need to look behind which made finding the unit tricky on the first day, however a quick phone call to Francesco and his mother Antonia appeared to meet me and help me locate the address.
I'd happily stay here again if I visit Milan in the future and would highly recommend it to single travellers or couples staying in Milan.