Juan and Martina are both super friendly hosts and really help make the stay feel more personal. I had a short 5 night stay in Buenos Aires on my trip from Santiago to Asuncion and they helped make it as comfortable as they could.
There's so much to see in Buenos Aires and their location is pretty good considering it's about a 10 to 15 minute walk to one of the major metro lines and bus stops line the main road in front of their building. There's a nice breeze on the 13th floor, the fan provided in the room helped to mitigate the summer heat. There's no AC so it was a bit warm at times, but I planned to be out exploring most of the day anyway.
There was plenty of hot water and water pressure in the shower and the bed was very firm, but good for my back. The third day of my stay there was a lot of construction noise from the apartment directly above, but this is outside of the host's control. Juan graciously helped me deal with the noise during an important call I had scheduled.