This apartment is perfect for a wonderful trip to Madrid: it is close enough to Atocha to facilitate easy day trips out of the city; it is nearby the museums to allow you to visit multiple times for short visits; the neighborhood is wonderfully lively and you will love walking the streets in the evening. Additionally, the neighborhood has everything you need, from markets to pharmacies, to hair salons.
The apartment itself is very quiet, is well furnished with comfortable beds, a great sitting-room with a nice TV, and a well-functioning air-conditioner. It is also very clean and well-organized.
Paloma is an excellent host, and will help however possible. She was very easy to communicate with, and she was extremely helpful. I highly recommend this apartment!