This is a very stylish and comfortable apartment in a good location from which to explore BA. Very secure and even has a small safe for valuables. Maria is an extremely helpful host who was easy to communicate with and always providing quick responses. You are within easy walking distance of many restaurants, bars, recreation parks and shopping areas. The main station and Metro lines are also close by, to explore further afield. I would definitely recommend asking Maria to arrange your airport transfers. We had some internal flights arranged from both airports and the transfer company used were always on time, courteous and a good price arranged by Maria prior to the transfers, accepting USD or AR$.
One point to bear in mind is that Buenos Aires is a very noisy city, so a certain level of noise should be expected, but we were surprised at just how much. The apartment is on the second floor of a modern block located at a busy intersection. Substantial traffic noise was evident from the early hours until late into the night. Also noticeable were noisy neighbours above and to the side, who were still having loud conversations and making domestic noises at midnight. This needs to be considered carefully by those who are light sleepers. However, I think this would be the same almost anywhere in central BA.