I was pleasantly surprised with Sylvie's place. The flat is modern, stylish and clean. The room is large and offers enough storage. The bed and pillows are comfortable. The kitchen is very well-equipped and the living room is cozy and bright. The whole flat is functional and well-decorated, and makes you feel welcome and happy to be there.
Sylvie's place is a five-minute walk from the bus stop. There are regular buses going to Biarritz (or other nearby locations). A bus trip to the centre of Biarritz takes 8-10 minutes and the 24-hour ticket costs €2 (you can make as many bus trips as you like during the 24 hours after validating it). The Biarritz airport is also close by (a thirty-minute walk if you're feeling adventurous and/or travel light).
I would definitely stay here again :)