Fabiana's apartment was in easy walking distance of the Cemetery and museums in Recoleta. The area felt very secure and safe at any time of day or night. There were small groceries and panaderias within one block which made it easy to make breakfast in the kitchen. There were many restaurants in easy walking distance and buses passed near by which we used to visit the rest of the city. I would suggesting getting a SUBE pass that can preloaded and then used on all of the mass transit, including the regular train to Tigre. Fabiana was very friendly and provided us with answers to all of our questions about the city, as did the congenial concierge for the building.
We really enjoyed the walkablity of the city and large number of outdoor cafes. Late March is a great time to visit Buenos Aires.