The apartment is misrepresented in the description. It was described that it is next to Bernabeu, and the Corte Ingles de Castellana. In reality, it is 1.5 kilometers from Corte Ingles de Castellana (according to Google).
The closest metro station is 600 meters away (not 150 meters according to the description) and the line does not go directly to the center. The bus line is not direct to the center (Puerta del Sol) either.
It is located at a place far from the center and all sites of interest. Therefore, it is not recommended for stays of 4 or 5 days.
The neighborhood is safe but is very blant.