I really enjoy staying in a residential part of cities I travel to, and Cristina's place is great for getting a feel for what it's like to live in Buenos Aires. There is a great tango bar up the street a bit (Sarmiento 4066, I think). There is a bus stop across the street and a subway a block away. There are great restaurants nearby.
The place was very clean and comfortable and very quiet for sleeping. Christina provided travel adapters. There was a full/double bed and a twin in one room, and two twin beds in the other.