This is a gorgeous Airbnb in the heart of the central historic district of Madrid. The place was very clean when we arrived. The street is also great - lots of restaurants and bars, but it was quiet in the Airbnb at night as it is far enough above the street.
Be aware that it is a climb (about 5 flights of uneven stairs) to get to the front door, so if you have any mobility issues this would not be the best option.