My parents stayed in Rocio's apartment for a week and were really happy. The apartment is in a really non-touristy but safe and pleasant neighborhood, very close to the subway and walking distance to lots of parks (with playgrounds!). The apartment was super clean, had everything from extra blankets and towels, to a washing machine, to a fully equipped kitchen. There were lovely touches, like a chocolate loaf, and jars of homemade jam in the fridge. All in all, a nice place. Not pretentious at all, not fancy, just a really nice place from which to explore Buenos Aires.