The flat lay very centrally and everything could to be reached by foot. Otherwise one could also use the metro which has a station (Embajadores) directly before the appartments front door.
The flat itself is furnished very modern and nicely and will be handed over in a freshly cleaned state. Even croissants as well as coffee lay ready as we came.
Only one (for me personally) negative point was the very scanty daylight. Because the appartement lies very much built-in in the first floor, a lot of light does not come through the windows. So in addition you need artificial light the whole day. However, because we were outside in the city most time of the day, it bothered only a little.
All in all, a recommendable flat in the heart of Madrid.