I have stayed with Mary for 10 days too, she is super nicel and very kind. The room is simple and clean, and a house has everything you need. This place has a perfect location, near the best transportation system, bus. metrobus, subway. But, there is a construction beside here and it is making a lot of noise. They start 8am and stop 6pm. I don't think it will take a long time to finish. But it isn't good for the people who wants to sleep till later in the morning. The place is in the heart of San Telmo, the most historical and and bohemian part of Buenos Aires. A great place!