Elizabeth is a great host, I enjoyed the hospitality. The flat is nice and cozy, I really recommend it for short stay in Madrid. You can easily get to the city and even walk back home.
The neighborhood is nice and you will be in touch with the local life there; Don't miss the coffee or beer with the local in the down cafeteria.
You have all you want around you; Park, Bar, Supermarket, Pharmacy, Royal Palace ;) and fresh fish.