Charo was a great host! She gave us numerous recommendations for tapas spots around town and helped highlight all over the map of Madrid to let us know of some cool activities to check out. The neighborhood of Malaseña could not be better; Tons of cute restaurants and shops, and close to a few metro stops (which takes you everywhere from the city center to the airport). Gracias por todo Charo :)
P.S. I would definitely recommend asking which apartment to buzz into beforehand!