As a solo traveler in Madrid for work, this place was almost perfect. It is well located in the center of activity and transportation but it is on a quiet and calm street. Fernanda and Francisco were extremely attentive and communicated quickly for the entirety of my stay. The bed was really comfortable and the space was a good size.
The only two small issues were that the A/C is very weak and some of the kitchen items/area were dirty. The A/C was very weak at night to the point that it almost seemed like it wasn't on, which was hard because I traveled in July. Otherwise this was a great stay.