Saul's place is just perfect if you want to spend some time in Madrid. Very close to El Prado (15 minutes by walking) and Reina Sofia (5 minutes by walking) and is really close to Lavapies metro station, if you want to visit the rest of the city.
The place can be easily reached from the airport thanks to the metro. At the airport get to the station inside the terminal and get down to nuevos ministeros. From there take the line number 6 (circular) until Moncloa station and from there you can hop on line number 3 to Lavapies. Raul is always ready to answer your questions, even if you contact him via Whatsapp. I would really recommend this location. He even gave me shampoo and body gel to use in case I didn't bring mine. Gracias Saul!