I stayed at Maria Teresa's place for a one-night layover in Madrid. As other reviews have said, Maria primarily speaks Spanish, but her son speaks English very well. The whole family was nice and accommodating of the fact that I had to leave at 5 am for an early flight. Maria gave me a map of the city center and recommended several places to visit. Her place is right near the El Rastro Flea Market, which is on Sundays, and not too far from the Royal Palace, museums, Plaza Mayor (about 10 minutes). The room was cozy and had all of the basic essentials. There is a cute little balcony and nice curtains that shut out the light if you want to sleep. The only issue I had was that I struggled with key to the apartment, but Maria Teresa said that someone would be home to let me in, so it was not a problem. Overall, I recommended the place as an affordable option for central Madrid!