The thing I like the most about Gri's place is the location. It is in San Telmo area and the Sunday market is right on her doorsteps! It is an easy walk to the bus stop and from there to get around the city.
Grid is also a wonderful host and is extremely helpful. As I was only planning to be in the city for a couple of days, she loaned me her Sube card to save me the trouble of getting my own.
Definitely recommended!