Dario and Sabina are super amazing hosts, they helped me a lot to organize the perfect trip for Rio for 13 guys who came from all over the world to do their internship in Brazil. We stayed 4 nights at their place, and we all wished if we could stay for more. The location is really nice, and the hostel even more nicer with big social areas and a really enjoyable rooftop. We were treated very well, and there were no language barriers (english, portugese and german were all okay). Also the area is pretty cool, so if you choose to stay at their place dont forget to check out the top of the mountain ;)