Natali and her brother were very responsive to needs. The space is a large one bedroom, with a true living room space which can accommodate probably another 1-2 people. About a 10 minute walk to the plaza de Mayo and 15 minutes to San Telmo. There is also the 60 bus, steps from the door, which seems to come every 1-2 minutes that you can catch to go to a number of places. Note about the neighborhood - it isn't Palermo or Recoleta. There are a number of blocks that will be deserted at night so use caution. I had no issues and I walked around at 4am. I stayed in Recoleta earlier the same week and got literally half the space.
It is also 3 blocks from the massive 9th of Julio street which is well lit and always populated.
All in all - easy to get to San Telmo and many of the sites you want to see, the space is huge and Natali and her brother are great.
Ahora en espanol - Natali y su hermano era muy amable. El espacio es grandismo, 2 veces mas que yo tenia en recoleta el mismo semana para el mismo precio. De 10 minutos a la Plaza de Mayo y 15 a San Telmo. En serio - el barrio no es como Recoleta y Palermo - hay poca gente en la noche y no tiene que tener un poco cuidado pero tambien camine a las 4 de la mañana y no tenia problemas.
Al fin, es facil a ir y llegar y Natali y su hermano eran buenisimo.