Gorgeous apartment as the photos very accurately show. It is luminous thanks to the private and well appointed patio that also doubles the size of the living space. It's of a Nordic minimalist decor without losing comfort or conveniences. The kitchen is ample and modern and has all what is needed for a short or long stay (although an electric coffee maker would have been welcome!). I didn't try the single beds on the second bedroom but can attest the master bedroom's is very comfortable. The bathroom was very nice, especially the shower, roomy for Spaniard standards. It was very quiet, which is not the norm in Madrid's lodgings. Now, be aware that there is no A/C, but with the patio doors and windows open it cools the apartment.
It's a safe neighborhood a block away from the main artery of Madrid. Very close to the airport (15 minutes car ride) and a 15 minute walk to Chamartin, one of the city main train stations. It was very convenient for my visit since it's located close to La Paz hospital where my father had been admitted.
Beatriz was an excellent host, with easy and clear contactless checking instructions and always available to answer my questions and help out.