We've been at José & Maria's appartment for 5 nights last week. Flat well equipped. Great location (Madrid city center -just in front of Parque el Retiro). Museums (Prado-Reina Sofia-Thyssen) can be reached by foot crossing the Park...Very quiet at night. Clean area & neighbourhood.
On the other side- quite far from commerce bouche (but we never ate in the Appartment) and flat a bit wet (but José explained us how to switch on the heating). Careful, no locked place to keep your luggages if you're leaving late.
Overall satisfied.
We said we will return.