VERY DISAPPOINTED with our room. Booked 2 nights 'Superior Double Room with Balcony', but the room was DEFINITELY NOT "SUPERIOR";
Paper thin walls / no sound proofing (very disturbed sleep), small bathroom (mouldy shower cubicle), Ridiculous open wardrobe (no door), portable clothes rail located in front of wall mirror, missing bedside table, VERY TINY TV with only 5 working channels (all local French) and no sat channels.
CONCLUSION; hotel location is great, but room quality questionable. There are certainly much better hotel options in Biarritz.