I booked Maria's appartment for my mother, as she doesn't speak Spanish and it was her first time using airbnb. She found it a very pleasant experience (although she eventually never even met Maria, who was very kind when I picked up the keys the day before). When she didn't understand something about the lights, I asked Maria and she immediately responded with the explanation. The appartment of course is not very big without many windows (which is very typical here and against the heat), but it was very clean. Her only note was that there was a small hint of cigarette smell. The location is perfect: next to Temple de Debod (which lays in an amazing park to hang out with sunset) and very close to Malasana and Gran Via. The metro is only a 5 minute walk away. Maria seemed very interested in us and treated us like her own guests, which we of course were. And that's exactly how airbnb should be.