Upon arrival Sylvie was very welcoming and helpful. She gave me tips about Biarritz and when I told her I would perhaps like to stay for another night she offered to put it on reserved, for me to decide later whether I wanted to take it. Which was very friendly.
I would recommend this airbnb to anyone who likes to stay near the center of biarritz. However you have to be prepared to live in the same appartement as the host, as she sleeps in a room only a few meters away from you, which implies that you really have to be quiet during the night.
This became apparent for me, when I went to the toilet during the night. When I went back to bed and she came out of her room angrily, telling me I had to leave the next day and was definetely not welcome for another night, which made me feel quite uncomfortable.
In hindsight one of the things that produced the noise was me cracking through one of the slats in the base of the bed, which was apparently already broken and poorly repaired. I got charged 5 euros for this.
So in short, I would advise this airbnb to anyone who does not mind sharing it with the host and who is prepared to take extra caution not to make too much noise, as Sylvie will then be a very warm and welcoming host, providing a good accomodation for a fair price.