María's place is located in a very calm residential area. Metro and bus stations are very close so going to the city centre is not a problem. The room and rest of the house was very clean. She let me use their refrigerator and cupboard for my groceries. Breakfast is a nice touch as I like coffee first thing every morning. Lot of parking spots around so that's definitely a plus.
All in all María and her husband are very pleasant people and I would highly recommend their place to anyone visiting Madrid.