Me and a friend stayed for five nights and really enjoyed the accommodation! It'sa great location, very calm and relaxing, pretty close to the beach, with bars and restaurants around. Bilbao is very good to be reached by metro, takes like 20 minutes. Patxi has got a dog who will bark at you but is really very cute and friendly!
The room was okay, since we spent a lot of time outside, but felt a little small with time.
Patxi is a great host, he gave us a lot of recommendations, explained the area around us and was always up for a chat. So, all in all: can recommend!