My stay at Maria Teresa's was very brief. I only booked one night and left at 6:30 AM the following morning to go to Madrid Barajas airport via subway and catch my flight. The apartment is convienetly located within a five minute walk of two subway lines (** for travelers going to the airport via subway from this address, It costs about 6 Euro, requires two changes of subway lines, and takes about an hour of time).
Maria Teresa was a very helpful and accommodating host. She allowed me to check in before normal check in time, assisted my departure the next morning, and gave me restaurant recommendations.
The room itself is on the corner of the building overlooking the street which generated a little background noise from traffic and pedestrians. However the very large, comfortable bed helped dispel these small distractions.