We had a nice stay at Ruggero & Edwin Flat. The flat is not located in the top center of Milano but in the north (as indicate in the ad), just next to the centrale station, which is really useful.
The flat is well-equipped. It is indicated for 11 persons, but we were 6, it was ok but not so big, particularly for the bathrooms. To resume, I can recommend this place and particularity the service offered by the host (such as the email from Edwin with all the details). Thanks again.