I spent three nights at this centrally located lodging. It is located on the third floor and is one of several apartments converted into a lodging facility with subdivided rooms.
It was, by far, the best hotel I stayed during my two-week European trip.
It was spotless clean and nicely arranged. The rooms are cleaned, and beds are made every day, as in a fancy hotel, and the staff is quite friendly and helpful. One unusual, but particularly useful feature are the various signages everywhere. At the entrance, there is a large map of Madrid with the main tourist sites to visit, and one wall in my room was covered with more helpful information, such as WiFi passwords (no need to carry around little paper slips with passwords).