Not very happy with the apartment mostly because there were basically no windows and the whole place is very dark. The windows are blinded, facing small courtyard. As it is ground floor it is very dark and you cannot even tell whether it is sunny or cloudy outside. Also the mornings were quite difficult for us because of that.
The location is convenient because it is very very close to the historical centre of the Bilbao, which is great. But this city district doesn't look the safest on the first sight. We had no real issue, but the feeling of the neighborhood was really mixed.
I would recommend the apartment for short stay only.