We enjoyed a few nights at Calle Jesus y Maria, family of 4 including 2 teenagers. The location was good, a small street with a little square at the end of it. Close to a few restaurants and bars. The apartment was clean and comfortable and we were greeted by the host who explained everything. They also arranged for a taxi pick up from the airport which was very convenient after a transatlantic flight.
If you are interested in using the bicimadrid electric bicycles while there I recommend setting up the online account before you arrive, there is a bicycle station with lots of bikes right at the end of the street (and many of them all around town), would have been a fun and inexpensive way to move around.
I recommend this apartment.