You can't go wrong staying at Marco's. We (4 people) stayed at Marco's in December 2017. Italian apartments sometimes have poor insulation for the winter. Marco's apartment, on the other hand, was quite warm and cosy. Beds are comfortable and the location is exceptional. Right on the corner there's a tram stop where you can take the tram directly to the center. Also on the corner, there's a local bakery with excellent breads, sweets, and coffee (we had breakfast there everyday! The prices are also excellent). Nearby there are many supermarkets, including a Lidl in case you want to save some money.
Marco is an excellent host. Communication was easy and he offered us all the details to go about Milan, the neighbourhood, and recommended us some nice restaurants in the city to try the local dishes. Marco also offers a pick up service, which I used and recommend - specially if you're u are heavy on luggage. If in Milan again, I would definitely stay at Marco's again.