First, Tania was a fabulous host. She was very kind, and responsive, and flexible with both the check-in and check-out. I locked myself out of the apartment and, though she was out of town, she arranged for me to get keys to get back inside.
The apartment is as shown in the fotos. It's large, there's lots of light, the bed is comfortable and there was minimal noise from neighbors (despite the holiday and World Cup games). The apartment is an easy walking distance from San Telmo and Montserrat restaurants and bars and only 1.5 blocks from the Indepencencia Subte B and A station. I found the neighborhood safe even in the late hours.
I highly recommend Tania's place.