The place is perfectly located in a great neighborhood (San Telmo) and 1 block away from a metro (subte) station that connects you with any other place in Buenos Aires. There are also bus lines (colectivos) in every block that can take you anywhere. Within 3 blocks of distance in any direction there are plenty of restaurants with delicious food and lees expensive than in other parts of Buenos Aires. The apartment is located on a main avenue which makes it very convenient for everyday needs, and the windows have very good acoustic protection so that the noise is not heard inside. The place is neat and cozy. The main bed is spectacularly good, not only the mattress (my back is an expert detecting good mattresses) but also the duvet and the pillows. The bedroom closets are spacious. The cooler and heater work very well, so the temperature is very comfortable. Internet was really fast and reliable.
Sergio is indeed a superhost. He was extremely attentive to our every need. Communicating with Sergio was easy and fluid. He helped us get settled and find our way around. We spent two months and he was helpful throughout our stay with many things that were not related to the apartment.