Henri and Helene's house is lovely. Helene wasn't able to be there when we stayed but Henri made us incredibly welcome. We were able to store our bikes in the garage and we had a bedroom and shower room to ourselves. Everywhere was spotlessly clean. The bedroom is small but fine and the bed is comfortable. The shower is lovely and hot and powerful and right next to the bedroom so basically an en suite. Henri met us with drinks and was very friendly.
Sare is a lovely little village with a few good eateries and bars. It is walking distance from the house. We stayed two nights and walked up to La Rhune from the house during the full day there. The walk was a round trip of just shy of 9 miles so the house is the house is the perfect spot for the walk. If you'd like our route get in touch and I'll share it with you - it was a circular route with very little duplication.
I would definitely recommend Helene and Henri's place, this was one our best Airbnb experiences because Henri made us so welcome.