The apartment is nice and next to the river which is very pretty. It is near the center of Bilbao but it is quite a walk to any attractions or services.
The location is difficult to find as the address is given in Basque language and Google/Apple Maps had a hard time finding it as it is listed. The apps kept taking us to the wrong place. There is free parking on the street in front of the apartment but it can be quite difficult to find an open space. This forces you to really consider if you need to go out by car because when you return, you may not be able to find parking within a reasonable walk.
Nice bathrooms but the kitchen is poorly stocked and needs renovating if you plan on doing much cooking.
We had a big problem with the deposit the host asked for. We knew the host was asking for a security deposit plus additional deposit because we had our small dog with us. However, we were surprised that they wanted the deposit to be paid to them through a 3rd party app at check-in. Reluctantly, we agreed and presented our credit card. The app would not accept our credit card from a major US bank. Apparently they always have trouble with American credit cards with this app. That would have been nice to know before we arrived. So we said we would get cash the next day. There was a 17% fee for withdrawing cash so we contacted AirBNB. This problem was eventually resolved to our satisfaction but not before receiving a very nasty letter from the host saying we had disrepected them and they would report us to AirBNB. Of course, asking for deposits outside of AirBNB is prohibited and hopefully the host will not ask that again.
Overall, it turned out OK but we were quite uncomfortable staying there at first and offered to cancel our stay. They refused that offer. Unfortunately we had already booked an 11 night stay there.