Joseba was a very good host, always available. His place (and his girldfriend's I assume - there was another host) was very clean and the location was great; walking distance to many neighborhoods. The room was comfortable and cozy.
It might be my bad but I hadn't understood from the room description that there were two other rooms in the apartment for airbnb. It said "There is an individual bathroom for individual use. Eventually is shared" in the description but I didn't gather there would be more guests in the apartment. there were no canaries like mentioned in the description, either =)
Overall the apartment was quiet (though the boards squeak a lot and you hear each person walking). Till midnight I could also hear the neighbors' TV or talking - the room I stayed in was facing an inner square with all the other apartments' windows - but late at night it was very quite.
Maybe important to some of you: The lift was not working when I was there (10-17 Aug). I didn't mind the stairs but it was 135 steps to the apartment, so if you are not in a state to climb those, I'd suggest you check with Joseba if the lift is working now.
Overall, I had a comfortable stay and would recommend Joseba's place.