We had the best time at Arritxulo and the staff were absolutely great. We were a large group (13) and they catered to every need and request, offering recommendations for nearby restaurants, hike trails, furnishing us with any essentials and even teaching us some Basque. The hostel dog Pichko was very friendly and we enjoyed a sunrise walk together. The building itself is simple but spacious, and the downstairs restaurant and bar is buzzing in the evenings with locals and hikers. Great for school trips and family vacations as there is quite a lot to do besides hiking - wall climbing, ping-pong and playgrounds to name a few. Fantastic experience and would definitely stay again.