Gustavo is an excellent host, very responsive and flexible, he would quickly answered my questions about the place or the city. His place is in an excellent location, a few steps from restaurants, grocery stores and pharmacies. He welcomed me with a very nice bottle of wine and snacks. The apartment is very comfortable and well decorated and is very well equipped with everything you would need for your stay, he even provides you with a public transportation card which is a very useful if your going to use the Metro or the buses.
If you are looking for a place to stay in Buenos Aires do not hesitate. I highly recommend Gustavo’s place.