The apartment is in a perfect location just 10 minutes from Atocha, Museo del Prado and Reina Sofia and you will find a lot of bars and restaurants in the area (Barrio de las Letras).
The furniture is simple and not super new and the apartment is really small but everything is functional and clean.
Unfortunately it gets quite loud in the weekends since there is a disco playing loud music all night long and ear plugs will help only partially. This was the only downside.