The apartment is small but functional, well located in a very safe and well connected area of the city. It is close to bus lines and shops on santa Fe, but being slightly removed from Santa Fe means street noise in the apartment isn't so bad. Subway stops are a 10 minute walk.
The apartment itself is fine, good wifi, comfortable bed, full kitchen. The shower is fine but might be uncomfortable if you are very tall.
Something that rubbed me the wrong way is that Fabiana charged me USD20 cash for "early check in" which she said was anytime after 9. However, when I arrived at the apartment at around 11:30 (communicating about my arrival the whole time) she still kept me waiting for about 30 minutes. If you are going to charge extra for early check in (a service many Airbnb hosts provide for free), I feel you have a responsibility to be prompt. Overall, though, the stay was fine and fabiana was generally very responsive.