My wife and I use AirBnB a lot and Esteban is the perfect host. Very attentive, flexible and available. And for the non-Spanish speakers, his english is excellent.
The apartment is like one of the biggest hotel rooms you could imagine with a stunning view from the 21st floor. You can see the Ecological Reserve (which has a perfect 7km loop for running), the famous bridges & football stadium of La Boca, Puerto Madero and the entire Buenos Aires cityscape.
The facilities in the building (which is part hotel) are excellent. A fully equipped Gym, a Sauna, a Swimming Pool and a laundry room on the "E" level from the service elevator.
The 24 hour security is wonderful and the location could not be better. Turn left and you are in the fancy Puerto Madero area with great restaurants. Or turn right and you'll be in 'bohemian' San Telmo with it's numerous craft beer pubs (which I love) and eclectic/reasonably priced restaurants. There is also a number of Supermarkets nearby (Jumbo in Puerto Madero and Carrefour in San Telmo).
If you buy yourself a Sube card (from the metro or some post offices) you can use the excellent Metro Bus which is one block away and visit all areas of the City or connect with the Metro to venture further afield.
We were so happy that we are planning a return visit soon.