The apartment : super clean, very large, modern and airtight, on the third floor of an apartment building just off the main highway through the town. There is a little noise from the highway but not enough to be a problem. Big enough for six to sleep, only one bathroom but with a very nice shower. Modern kitchen with most of what one would need to cook simple things. The bed is nice, I'm tall (188cm) so it was a little small for me and a little harder than I like but very nice linens and pillows.
The location : above the main town, you walk along the main road 200 meters to get to the "upper plaza" where you will find a little store, some bars and the tourist office. Walk downhill towards the "lower plaza" and eventually the port. No industrial activity in the port (unlike Ondarroa or Getaria), it's a quiet walk all the way out to the new giant bulwark against the waves. I've been told that there are turbines inside that generate electricity from the tidal currents. I can confirm that there are very strange whirring noises. Also, the city is surrounded by green, all uphill, with even a small mountain (Arno, 620 meters) at about 2-hours walk; you can leave on foot from the apartment.
The hosts : very concerned about your happiness in the apartment.