The place is simply but well furnished. It is ideally located in the heart of barrio Salamanca, near the Mercado de la Paz, Calle Serrano, Retiro Park, etc.
All the rooms in the apartment have at least one window, which is a big plus, however they open onto two air-shafts so expect a vis-a-vis if you want more light than when the curtains are drawn. That said, the apartment is not dark either. It works well.
The kitchen is well equipped.
The only hiccup was with check-in and communication, which wasn’t always the easiest. But in the end it all worked out and I was satisfied with my stay!