I highly recommend Hotel Madison. When we visited Saint-Jean de Luz a few years ago, we stayed at Hélianthal Thalazur, but we enjoyed Hotel Madison more. The small size and friendly staff made for a more personal and welcoming experience. We upgraded one room size, and found the room and bed to be large and comfortable. Hélianthal Thalazur has a large spa area with various pools, but there were a lot of people there, and figuring out the rules and processes was impersonal and a little unpleasant. Hotel Madison has a small but lovely hot tub, pool, sauna and workout area, limited to 10 people at a time. They also have a massage room and can schedule various spa services. I didn't want any of that, but if I did, I'd see if Hotel Madison could schedule what I wanted before I went to Hélianthal for the spa program. We enjoyed breakfast and coffee in the Hotel Madison bar, and a cheese and charcuterie plate with a glass of wine in the evening.