I stayed at Julieta's place for nearly 2 weeks with my son and it was a really great place to stay in Buenos Aires. As per previous comments the apartment looks exactly like the photos and is really light and comfortable, as well as clean and tidy.
The kitchen is reasonably equipped if you want to cook your own meals, if not there are no shortage of good places to eat in the vicinity, as well as bars to wet your appetite.
Palermo is a great place to base yourself in Buenos Aires, especially if you are there for the nightlife...also handy for museums, art galleries etc.
Julieta was a perfect host and brought me over additional blankets, towels and sheets and speaks great English, which is helpful if your Spanish isn't too great!!
I would totally recommend it as a place to stay, unless of course you want complete peace and quiet, in which case, this is probably not the place for you.
If however you want to stay in a funky, comfortable little apartment in a vibrant area, close to everything...ideal!!