Iker greeted us warmly and guided us to the free parking space (one note of caution -- the curved ramp to get in and out of the garage is very narrow for an intermediate size car), and he left us printed info in the apartment with tips on restaurants, excursions, etc. The apartment was clean and well-equipped. The location is very good if you want to be near the Guggenheim. It's about a 20-minute walk to the Casco Viejo. We found the apartment quiet. There was a minimal amount of noise from upstairs but not enough to bother us. Iker offered to be available if we needed to call. It was a pleasure to meet him; he is a very nice and hospitable guy.
All in all, a good value for Bilbao.