Catherine's apartment in Biarritz is spacious, comfortable, and well located, only a 10-15 minute walk to the centre, with a shop, restaurants and bus stops nearby. It's located in an impressive historic building, though fully modernised, and is tastefully furnished and decorated. It overlooks a fairly busy road and traffic can be noisy at busy times, particularly with windows open. This was not a problem for us and we would certainly book again.
Greg, the concierge, was most attentive to our needs and responsive to our questions. Highly recommended.