Josu is a wonderful host and offered incredibly helpful and welcoming suggestions. The place is spotlessly clean, filled with great amenities, and wonderfully located. It suited my needs perfectly, and because Bilbao is so easy to get around on foot, I loved having Old Town as my home base and being able to walk down and across the river to some of the more modern parts of the city.
The only drawback is that the apartment is just one floor up and opposite a rowdy nightclub, and smokers can congregate outside until the wee hours. Thoughtfully provided earplugs help, but early risers may struggle.