Marco's place is in a great location close to the center of Milan. It's an easy walk to the heart of the city. The apartment complex is secured by a heavy door, and the apartment by it's own heavy door, so we felt very safe and did not worry about our belongings. It's very quiet which was perfect for us. Bed is very comfortable. We had to check in late since our flight was delayed, and Marco was accommodating and very hospitable during check in.
Read the other reviews to get an idea of the small size of the apartment, and, in particular the combined shower and toilet. Not a major inconvenience, but not what you might be expecting.
Try the Italian coffee maker, and be sure to close the elevator doors! :)