I had a great time in Ernas house. I never got to meet her in person, but she replied very quickly to all my messages. When I arrived there was a horrible heat wave (more than 40°C) and the air in the room ("torre") had an even higher temperature since it's right under the roof. But when I brought the topic to Ernas attention she let me change the room right away and I was than really happy with the other room. The rooms don't have air-conditioning but you are provided with fans for the dormitories and the arquitecture of the house causes the common room in the center of the house to be the coolest room during the day and make it the perfect room to spend the afternoon.
There were only a few rooms rented to residents during my stay so it was rather quiet (which I enjoyed), but the common room in the center of the house and the big kitchen offer a lot of possibilities to get to know the other residents. I had very nice conversations (mostly students and young adults).
The house has everything you might need, although it might feel quite old (opening and closing the different doors is always a little adventure :D). But the original style of decoration and architecture are a big plus of the house and makes it so beautiful!
So, all in all I can really recommend a stay.