Our host, Iker, was a very kind man, he helped us with transportation from the airport to the house when we had a 12 hour delay. This was very welcoming and something that is worth a lot at such a moment. The house is as is described in the text and pictures. The only thing missing is that there is also a balcony where you can sit in the shade too.
The location is perfect, the subway is 150 meter away and the tram and bus are 300 meter away. Public transportation is cheap and convenient in Bilbao, so I would advise that if you are there for a visit. Stores are nearby as well, a large supermarket is just 150 meters away which is great to have.
When you are in Bilbao, check out the pintxos, the Basque variant on tapas. They are everywhere, even two in the same street as the house. And if you plan to cook and love meat, check out the butcher on the corner of the street and Autonomia.
When I go back to Bilbao I know where to stay!