Loved the stay, under 10 min walk to the beach (most of the surf schools are on the other side of Biarritz though if that is what you want). Near the town centre, we walked everywhere, and the location was very quiet! 5 min walk from the house was the street with Carrefour as well as some amazing artisan shops, for bread, cheese, meat, etc. Also very close to some amazing restaurants (Trip Advisor was very helpful!)
The house was very big, some rooms were in the basement, with three floors in total. Because we stayed a while, Marie organised for us for the house to be cleaned (some extra cost) but it was very convenient! The pool and the table tennis were the kids' favourites! Also the kitchen is quite modern and well-equipped.