The apartment of Eva and Borja is very spacious and nice. Location is not in the city centre, but that is not a problem at all. There is a playground and pelota court next door on a very lively little square where locals drink a beer and children are having fun. Ondaretta beach is just a 2 min walk, as are the gardens of the Miramar Palace. Nearby at the Calle de Matia are some nice bars and bakeries. Bus 18 stops in front of the house and takes you to the old town in about 10 minutes. But you can also walk for 25 min along the pretty boulevard.
It is super great that Eva and Borja offer an underground parking spot around the corner.
The house and kitchen are well-equipped, also with some puzzles and toys. The bathroom is the only thing not so super great. It is a bit small and not too fancy, but clean.
If you travel with (small) children I would really recommend this apartment.