This was an ideal apartment for the four of us (my wife, two daughters and me).
The bedrooms are a good size (even for a travel cot as well) and the amenities were all fine - but to fair, we did not spend much time in the apartment. Actually, all the rooms were a good size.
When we were there, we were not disturbed by noise from other neighbours. The noise from the street was nothing to be concerned about, and with the windows closed, it was not noticeable.
There is the possibility of a parking space and it is very secure and close by (but not part of the same building as the apartment). We have a Citroen Grand Picasso and were able to get in without too much trouble. It was a little confusing trying to find the apartment at the beginning, but Ainhoa was very good with the directions and instructions.
There is a small playground in the courtyard, which kept the girls amused, with more playgrounds within short walking distance (5 mins). The "surfers beach" is around 5 minutes away, and the "other beach" is approximately 20 minutes away.