We spent a month at Marcia's place, and we had a very good time. The apartment was perfect for our needs, with two nice rooms and a large living room/kitchen which gave as ample space to relax after busy days enjoying Buenos Aires. Supermarkets are close, and there are many nice restaurants in Palermo at 5-6 minutes from the apartment.
Marcia was a great host, and I hope we will come back to her place and Buenos Aires.