We stayed in Jose & Maria's apartment for 3 days in Mid October.
We met Jose upon our arrival. He was very helpful to provide us with a map and great recommendations what to do in Madrid.
The apartment is conveniently located on the first floor. Very clean and fully equipped. Bed is comfortable. First night I slept for 11 hours (!!!!).
The apartment is five minute walk from the metro, Mercado de la Cebada, a fantastic bakery and most importantly Cava Baja, where some of the most famous Madrid restaurants are located.
It's a 10-15 minute easy walk to Plaza Mayor and Royal Palace.

Strongly recommended