Location was absolutely fabulous, apartment was comfortable and well equipped. It was also very quiet despite the ongoing building works in the communal areas. There are a few wires to avoid tripping over but otherwise it didn't really affect us, and the hallways and stairs were well lit. The double bed at ground level and the double bed on the mezzanine level are within the same space. We were expecting two separate rooms to sleep in but we might have misunderstood the information. Also the mezzanine bed is close to the ceiling.
There are two supermarkets close by, a Spar just over the bridge and Carrefour City close to the Spar. These are open for long hours every day.
We got bus number 4 from the airport to the stop Echauguette, which is a short walk from the apartment. Lots of buses close by. You can get direct to Biarritz from Echauguette and the buses are really cheap, plus shuttle buses/navettes to go a few stops are free.