We had a wonderful family holiday in Bermeo. The apartment is spacious with a balcony overlooking the rooftops. It's well set up for groups/families with multiple double beds, a pull out bed and a sofabed. Location-wise, it's very central so on the edge of the old town and a 5 minute walk from the bus and train stations that can get you to Mundaka /Bilbao.
Julen was an excellent host, welcoming us when we arrived and even helping find a garage when our car got a flat tyre. Highly recommend.