Great unit just a short walk downhill into downtown Bilbao. Free elevator takes you back up if the stairs look too daunting in the heat. Great local tips from the host upon arrival. We visited the transporter bridge using public transport after she explained to us how easy it was. Get a 3E reloadable transportation card from a machine at the station (takes US credit card) and add 5E or 10E credit to the card in the same transaction. Several people can use the same card at the turnstiles. Rides cost <1E so it's cheap to get out to the beaches and that bridge.
Fast internet, good water pressure in the shower. Street parking looked difficult in the neighborhood (we returned our rental car in Bilbao within an hour of arriving so didn't have to deal with it).