We really enjoyed our stay at Anahí's. It is a comfortable and clean flat equipped to fulfill the needs of 2 travellers. We felt very welcome. The flat has a balcony and access to a swimming pool and is located close to the center and Recoleta, as well. The basic things can be reached on foot but the metro is also very close.
The flat itself is located at a main street, but the windows go to the court, therefore, it's not as loud as you'd expect. The only small downside was the size of the bed. For two tall persons, it's a bit tiny.
Also, Anahí told us places to visit and gave us maps and everything. She is a very nice host and always available if there is any problem.