We stayed two nights at Raul and Gabriela's house. The hosts were really friendly and responded quickly to our questions and let us check-in early. The house was nice and the room had a good heater. We did found two negative things about the place: 1. The advert said San Telmo but the house is a bit to the South in Barracas and we didn't feel completely safe in this area at night time, especially around constitución where the closest metro station is located. 2. The water in the shower took a long time to heat up. Apart from these two points, we enjoyed our stay and found Raul and Gabriela to be very accommodating hosts.