I spent five days in Jaime's beautiful flat.
Everything was perfect : the location is absolutely the best you could need: 2 minutes walking to Guggenheim Museum, also 2 minutes walking to the airport bus stop, 5 minutes walking to Plaza Moyua... Everything is close, the area is extremely alive with bars, restaurants, supermarkets and everything you'd need. The flat is yet very calm, no noise from outside.
The apartment has a soul, it is not a "typical" impersonal Airbnb, but it has a alive charme and you will feel at home for sure. The decoration is very nice, the procedure for the keys extremely easy (although I was welcomed by Jaime himself, I got immediately after the reservation as very detailed sks with a link with ALL information about the apartment: extremely professional and extremely easy. Without any doubt, the best procedure on Airbnb).
So, I warmely recommend you to stay by Jaime to have the best Airbnb experience in Bilbao!