The location is just amazing as it is in the heart of the old town, two minutes from the square with the best pintxos, very close to a great park for kids and right next to a tram stop to get to Guggenheim and some other key Bilbao sites.
Being in the old town it means it is a pedestrian zone and there are no cars (no noise) but a taxi would not be able to take you from the airport right to the door - there would be a couple of hundreds of meters walk.
The place is spacious and has everything one would ever need! There were even shampoos and soaps and toys for kids. Arantza provided us with a baby cot and chair for feeding. The place was clean and spacious for kids to play. Arantza provided drinks for our stay (soda, beers, wine) as well as the breakfast (bread, jam, butter).
As this area is full of bars, it can be a bit noisy in the evenings on weekends but the noise stopped by midnight which was fine with us.
We will definitely return as the place ticked all our boxes for a perfect long weekend in Bilbao, with or without kids!