This house was overall satisfactory, but the house was smaller than I had expected. The ceiling is quite low and maybe that's why I felt so. Also, it's on the 4th floor but the elevator was very old and narrow(as it usually is in old buildings in Europe), which made us hesitate to use it. Nevertheless, the location was just perfect. It was near major places and there was a metro station and taxi stop right in front of the building. Also, the heating was great.
The one bothering thing, however, was that I needed to take my own garbage out. Until that is fine, but I only can take them away at night since it is prohibited during the day in the center of Madrid. This can be a burden to tourists.
Overall, the house was nice enough.