Patricia's apartment has an excellent location. It was clean, quiet, comfortable, had an elevator, and was a short walk to the Guggenheim. Bilbao is a small city so it was very easy to get around. The apartment is also close to the main highways and convenient for transport to the airport and to San Sebastián and Santillana del Mar. I recommend these two side trips if you have time. There are many reasonable restaurants and a grocery store across the street.
Our flight was an hour late so there was an hour delay for us to get into the apartment. Patricia met us and guided us through the parking procedure. Yes, small space but we had a small car. She had to leave soon after because her mother was in the hospital so we had to figure out some things by ourselves, but no problem. Wifi was fast and consistent. The tub was a great way to end a long day of sightseeing. Bathroom well stocked but kitchen could use a few staples.
I recommend Patricia's apartment and will book it again the next time we are in Bilbao and recommend to friends.