This is a wonderful apartment in a superb location. On a quiet street (well, the Colegio across the street gets a little noisy when the kids report to school at 9:00 am but that just added to the charm for us) it is a short walk to the best tapas bars in Madrid on Calle de Cava Baja (our favorite was Taberna Tempranillo). And the 3 amazing art museums are no more than a 25 minute walk.
Javier was a perfect host, meeting us at check in and offering advice on restaurants, flamenco, etc. He kept in contact with us throughout our 7 night stay.
We will definitely return to this apartment when we return to Madrid. Truly a special place!