This is a splendidly situated flat in the top floor of a grand 19th century villa. It's about a 10-15 minute walk to the centre of town but, if walking is not your thing, the free shuttle bus to the centre leaves just outside. About 10 minutes' walk away is a small shopping street with a good array of shops for those all important food and drink items.
The flat itself is spacious and high-ceilinged, with one large and one smaller bedroom, and a marvellous living/dining area. The views to the sea are amazing and there is a wonderful sense of space and light. The decoration is old-fashioned so if you want a sleek minimalist kitchen and hotel-style bathrooms, look elsewhere! We loved all the original features and the comfortable, lived-in ambience. This doesn't feel anonymous and cold like so many rentals; it has character and charm, and it worked very well as a base for our stay. We felt completely at home.
The best part was our hosts' responsiveness to a couple of glitches we encountered (wifi on the blink). They were very kind and never left us hanging. The issues were followed up and dealt with proactively and with real warmth.
All in all, I cannot think of a better place to stay in Biarritz. Highly recommended!