I cannot say enough about how much I enjoyed my stay for a week at this apartment. It was just as advertised. It is in a terrific location for exploring Madrid. I especially like that it was on a quiet street but all around were numerous shops, bars and restaurants as well as conveniences like a grocery store just across the street. Malasana, Chueca and the Gran Via are all right outside your door. The Gran Via metro station is just at the end of the street. Yet the place is quiet. I felt like a local staying here.
Everything in the apartment was brand new and clean. The decor is cheerful and the furniture is comfortable. It is a small apartment, but for one or two people it is all you need. It is certainly much more space than you would get in a hotel room for less money. The bed is quite comfortable. The hot water in the shower is really hot and plentiful.
Others have noted that the floors above are thin and that you can hear footsteps. This is true. It was only a problem for me two nights, but if you are light sleeper you may want to bring ear plugs. There is virtually no noise from the street if you leave the French doors closed.
Finally, Eduardo was amazing in the speed and accuracy of his communication. I was truly impressed! I only met him briefly as I left my luggage in their office until my room was ready. But any message sent through airbnb were answered within minutes! This was both before arrival and while I was there. He also arranged a very nice car service for me to the airport, which I highly recommend. It cost the same or less than an Uber (and Uber service is spotty in Madrid). The driver arrived right on time with a luxury car. this was great comfort to me as I had to be at the airport early.
If this apartment is available, do not hesitate to book it. I would return there in a second!
Finally, the Bar Ardosa is just on the corner. This place has been there forever. Its always packed with locals and they make the best Tortilla de Patata in the city (its actually won awards!). A giant beer and a patata for 7 euros...can't be beat. This will quickly become your local!