Excellent, central place to visit Madrid's attractions. It takes, in one direction, a five-minute walk to El Prado museum and El Retiro park. Less than one minute walk to restaurants, cafes and bars in the beautiful neighborhood of Las Letras, where one can shop in unique small boutiques. It is also conveniently close to the Atocha station if you are taking the train out of Madrid, and a 10-min walk to the express bus to the airport. We walked everywhere and were able to take breaks for naps/showers in the middle of the day. While it is on a busy street, the bedrooms are quiet.
I truly appreciated that Sara greeted us in person, and gave our group of six a tour of the apartment, showed us how to use keys (3 sets), the AC, washer, etc. She offered recommendations, was very accommodating and was quick to respond when we reached out via the app.