Stayed for one night at Maria's place.
Slept better than been sleeping at hotels in Madrid.
Single room was comfortable. That and own washroom, were away from the hosts rooms. A shared shower was also clean and powerful.
The hosts were kind, helpful and friendly. Please treat them well.
Maria's place is not far from the river, yet easy to access central locations from there. A few busses run regularly and traverse into the tourist areas.
Highly recommended.