Host
Alejandra is a very kind host. Even though she was extremely busy during my time there, she always graciously answered any questions I had. She's enthusiastic about her city and wants you to have a good time while visiting.
Space
The room is small but contains everything you need. Comfortable bed, closet with hangers, table and chair. Just across the hall is the bathroom with tub and shower. The washing machine is available for use as is the kitchen. Breakfast foods are provided that can either be eaten there or grabbed on the go.
Location
A 5 minute walk in one direction is the metro that gives access to/from the airport and 10 minutes in the other direction is the metro that goes to central Madrid. Near the first metro station is a variety of stores and cafeterias. As for the neighborhood, it's very friendly with a mixed variety of people.
Bottom line
For the price, you can't beat Alejandra's place. A nice bed, a warm shower, and breakfast to start your day.