I had a wonderful time in Buenos Aires. Margareth is very pleasant, she helped me a lot. I also learned a lot about the culture and the city from her. :) The communication before and during my stay was great. The place is very clean and the neighborhood is amazing. You can reach so much great places within walking distance, and the metro is also very close to the apartment.
And try the outlet stores on the other side, I bought two jeans for my girlfriend. :)