As everyone has previously said, this is a really great find! Maria and her husband Enrique are the most welcoming, hospitable, kind and generous people They cannot do enough for you to make your stay as pleasant as possible.
On the first night I was invited to a wonderful meal with them and when you are travelling on your own, having just arrived in a new city, it was so appreciated. Maria is a great cook!
Everything at their house was just lovely and in a nice area of the city. I felt very safe with lots of amenities close by, including the metro.
I am going back to Buenos Aires in a few weeks and will definitely stay with them again!