I stayed with Maria (and Sambi 🐶) while i was looking for a room to rent in Madrid. Not only was Maria accommodating with the arrival time, she was super nice and helpful during the entire stay. The entire place was absolutely spotless and Maria moped and scrubbed the flat nearly every other day :0. The room was cozy, with all the necessities you might need, and the bed was very comfortable. Only very slight minus were the rather loud neighbors throwing a party one night - but this is Madrid, the night is only starting after 10PM.
I would definitely recommend Maria's place for anyone who needs a place to lay down the head at night.