The location is fantastic! Places to see are within walking distance and the metro station is 3' walking from the flat.
The family who lives in the flat is very hospitable, welcoming and friendly. Although I don't speak Spanish we managed to communicate. Was surprised that Roger (with whom I made all arrangements) does not live at the flat himself. At the same time he was very responsive and gave me all tips I needed. Also organized check-in so all was good.
I visited the place in February and it was cold inside the flat. Apart from that, excellent stay!