We were 8 days in the great appartment of Ismael and we enjoyed our stay.
Ismael is very pleasant (many attention found in the house) and provide good description to access to his location.
The appartment is very well equipped and very close to Bilbao (3 min to join the station by walk and less than 10 min of metro).
A parking is available in a public one at 2min by feet (we were lucky to always have a place for our rental car).
Note that appartment is at 2nd floor from street without elevator so not for people with walk issue.