This is a lovely family run hotel in a nice street with lots of shops/cafes/restaurants nearby. My wife and I stayed in a 'comfort' room' which was impeccably clean and very well designed with maximum use of the available space. There was air conditioning, the bathroom had an excellent shower in it and the bed was very comfortable.
The whole hotel was spotlessly clean and the service at reception first rate. We arrived early morning too early for check-in but when we did check in later our bags had already been put in our room. Whenever we spoke to anyone working at the hotel they were very cheerful, helpful and friendly.
We didn't have the breakfast but started our day with a coffee and croissant from a nearby bakery. That said, the breakfast at the hotel looked fine from what we saw.
This hotel is officially rated 2 star I think and that's probably because of its limited facilities (e.g. no restaurant or swimming pool, limited reception opening times...). But it's really a far better hotel than the rating would suggest.
If we visit Arcachon again then this will be the hotel we would we stay in.