My cousin and I stayed for a week in Silvia's cozy apartment in Recoleta. It was centrally located to all the things we wanted to do while we were in Buenos Aires. Silvia was a great hostess, greeting us when we arrived, helping us out with taxi reservations and checking in every so often to make sure we had what we needed. There is a convenience store across the street and a fruit/veggie stand next door, which proved very useful with household goods we needed throughout the week and it was very easy to get around the city by foot and taxi. And there were many things within walking distance that we wanted to see (Recoleta Cemetery, El Ateneo Bookstore, shopping, etc.).
If you're looking for a convenient, clean place, Silvia's is a good bet. Thanks for everything, Silvia!
Best, Nicole & Ari