We spent almost a week in the apartment, it is conveniently located, close to everything: grocery stores, restaurants, places to walk (a nice path along the waterfront a few minutes from the apartment to walk our dog). In Ciboure and Saint Jean de Luz there are signs everywhere forbidding dogs, but everywhere there are local people who ignore the signs and walk their dogs, so we ignored the signs too:) Only sometimes you have to be careful walking, because in some places you can step in poop... many people do not pick up after their dogs.
Laure and Carlos were very friendly. The apartment itself, although small, has everything you need, the internet works great. The inner courtyard is often frequented by neighbours (the apartment has windows facing the courtyard), but it didn't bother us, and we didn't seem to bother the locals either.
It's a pity that we don't speak French, as not many people in the town speak English, but nevertheless people seemed really friendly and made an effort to talk to us in restaurants or shops. We would love to come back!