The apartment is as nice as in the pictures. I highly recommend it for his location, commodity and feel-at-home sensation. Perfect size for a few days, close to everything, food (market, supermarket, fruit stores, bakeries and organic food stores), restaurants, boutiques, the Retiro, lots of transportation options including to the airport. Walking distance (less than 30-45 min) to most of what you would like to see in Madrid. Very calm with a nice inside garden and swimming pool. If you think of renting a car though, do use the apartment's parking space which we didn't regret taking.
JA was punctual and very helpful.
Thanks for a great stay, JA!