Ariel was a wonderful host! He was responsive and helpful, and his apartment is in the perfect location close to everything. A couple blocks away, you can catch the bus tours that go around the city, and at the end of his block is a subway station. Ariel gave me a map and answered any questions I had.

FYI a tip: The flat rate to/from the airport is 30 Euro (if a taxi driver charges more, they can lose their license). But across the street, the Senator Gran Via hotel offers a shuttle for 9 euro, which is what I did. Ask for Leo.