Nuria's apartment is in a great location: quiet street within 10 minutes of Puerta del Sol. The place was spotless when we arrived, and the owners left us the basics for breakfast the next day (coffee, tea, milk, orange juice, pasteries). The terrace is truly awesome. I would definitely recommend with one caveat: the apartment is on the 4th floor and all you have is stairs. If you have mobility issues you might want to look elsewhere.