I had a great stay at Vittorio's apartment. It is located in a convenient location for exploring Madrid, with a metro station just a short walk away.
The apartment was clean and comfortable. The kitchen was well stocked and easy to prepare meals in. I also really appreciated being able to do laundry while I was there. While the apartment is located on a lively street, I had no trouble sleeping. With both windows shut, not much noise makes it in, and the bedroom is located on the opposite side from the street.
I would definitely return here when I'm in Madrid again.