The apartment is very clean and in a great zone, it takes 15 minutes to walk to Milano Centrale Station and it has supermarkets and a Metro Station a few meter away.
It is nice, overall, however, there was some things that could be improved, like the bathroom door (it doesn't close completely) and the bedsheets (there's only one sheet and one blanket in a double bed, it is not enough for two people in winter).
Regarding the arrival, the instructions were very clear, but there was nobody to open the door so we had to wait in the street until a neighbour opened it for us.
Joy is a kind and attentive host, she answers really fast by airbnb message. Tip: be careful if you need to call her, as her number is American and the bill can be really expensive if you are European.
Apart from that, we had a last minute cancellation of our flight because of a strike, so we had to travel a day later. We asked for a change in the reservation to have a night less, as it was not our fault and she could have another reservation for that night. However, although we waited for her response for days, she waited until we had left the apartment to refuse our petition.