Javier's place is ideally located. Sandwiched between Malasana, Chueca, and Salamanca, the spot offers abundant (and delicious) food options, boutique shopping (at reasonable prices), and access to the Retiro Park and museum row within walking-distance. For other neighborhoods and sites, connections by metro are also easily accessed.
Javier did well to communicate with us in advance of and during our stay. He also generously arranged for us to drop our bags early and keep our bags a bit late on our check-in and check-out days. Much appreciated!

Nice flat, kept tidy and very clean. Its location is offset from the street, so the evenings were surprisingly quiet. Summer visitors should note that while the european blinds could help to moderate the temperature during the day inside the apartment, there's no air conditioning. We enjoyed comfortable temps, but during warmer months I could imagine some sweaty nights.
I wouldn't hesitate to book again; and if you're looking for a prime location without sacrificing a quiet night's sleep, you shouldn't either.