I stayed at Diego's flat for 33 days. Diego's place is a half-block from a COTO (supermarket), a ten minute walk to the University of Di Tella, one block from Avenida LIbertador and about a 12 minute walk to Avenida Cabildo (a major thoroughfare where you can take the subway into the city center.) The city center is about 30 minutes away by subway (14-15 stations away) but it goes by fast. As far as amenities: great shower, coin laundry on 9th floor (must buy tokens at a grocery store two blocks north, as well as own laundry detergent), single element heating stove (one of the portable kinds) so it means that cooking complicated meals is not going to happen, fairly quiet street although in the morning the drivers can get loud, security is great and the neighborhood is safe even late at night, internet worked great, has a good table for working and a small fridge. Diego made check-in and check-out very easy. Apartment heating works great, can hear upstairs neighbors some but the construction in general is solid. Make sure to take basic cooking supplies. Tips for Buenos Aires: See Toc Toc (a play), see Bomba del Tiempo (monday nights at KONEX), go to a Maldita Milonga session to learn some tango and watch the concert, visit the Parque de la Memoria and ESMA, the Teatro Colon has great shows (I've heard) that are completely affordable, walking around Recoleta and Palermo, go to the Feria San Telmo, just a few thoughts.