The location is just perfect. You are 10 metres away from Mercado de San Miguel (Saint Michael market), which is absolutely amazing, 50 metres away from Restaurante Botín, one of the oldest in the world (Guinness book), and walking distance from the main museums (20 minutes). Plaza Mayor is right next to the apt and La Latina neighborhood is 5 minutes away. It's also close to Opera House and Puerta del Sol.
The space itself is clean and luminous. We really enjoyed it.