This place it's the best you can hope for. It's clean, pretty, cheap, and the host are two super super nice persons. They live there, but they give you all the privacy in the world, and are very helpful if you need everything (they gave us all the info we needed before and after coming to Madrid, and Angel even gave us a ride to the airport at 5am!). The neighborhood is quiet and full of supermarkets and shops, even if not in the center of the town, but that's not a problem at all, because the subway is 10 minutes by foot and is very easy to use.
Me and my bofriend truly enjoyed our staying, if we ever come back to Madrid, I'm sure we know a place to stay!
Truly and 100% recommended!