ABSOLUTELY RECOMMENDED!
My stay at Arnaldo's place was way beyond my expectations.
The overall quality of the apartment was very high, cleaning standards even better than in a hotel and the check-in was super flexible and easy due to Arnaldo's great instructions.
The host already provided towels and the kitchen was fully equipped, so that you felt totally like at home from the first moment of entering the apartment.
The apartment is located in a very central area of Madrid so that all major sights are easily accessible walking, by bus and by train.
The host was extremely friendly and helpful and provided me with all important details for check-in, arrival to the apartment itself (bus stops etc.) and was open to any question I had.
Outstanding AirBnB-quality apartment!!