Very nice and comfortable apartment in a convenient area of Madrid. Close to the Metro and walking distance to major sites. The apartment was clean and spacious. The water pressure was especially good in the showers for Europe. Nice view from the windows, good shutters to keep light and noise out, and quiet overall from the street.
The only minor con was that the internet was generally poor despite resetting the router several times. The key is also a little complicated for getting in and out, as you need the key to exit the building. Definitely a recommended place to stay in Madrid.