I had a great stay at Maria's place. Maria is an amazing host! She and her mother picked me up and gave me a warm welcome. They took me on a short driving tour of the city so I was well oriented. The location is excellent for most everything you would want to do in BA, close to transportation and walking distance from many things. The place is small but very comfortable and surprisingly quiet for being in such a busy city. The internet connection was excellent. This area felt very safe to me day and night.
Maria and her mother are very sweet people, warm and caring. I highly recommend their place.
If you go, make sure you walk down to the waterfront to see the old ships and the Puente de la mujer. And then stop at Luccianos for some amazing ice cream.!