We had a great stay in Bilbao. Sonja's apartment is a great and comfortable place to stay. We loved the decoration and all necessary utensils and amenities are provided. The location is good, in a popular and fairly quiet area but just above the old quarter with lots of bars (through public stairs with lots of steps) - 20-25 minutes walk to the "new" center on the other side of the river (including Guggenheim).