I had a wonderful stay in Lucias beautiful home. She is extremely helpful - she gives excellent directions on how to get around. With her help, I found everything easily, and I never got lost. My room was beautiful, clean, and VERY comfortable, with its own bathroom and TV. Mornings, Lucia sets a beautiful table for [FREE] breakfast: coffee / tea, orange juice, fresh fruit, jamón of different types, cheese, toast, jams and butter, yogurt. The WiFi is super fast, too.
Casco Viejo is about 20 minutes away on foot, as is the Guggenheim Bilbao.
To get to the beach (Getxo), walk just ten minutes to the Metro Bilbao at Indautxu Plaza, and in twenty minutes, 10 stops, you're in the beautiful town of Getxo. Keep walking -- you'll find an amazing port town, more beaches, and a gorgeous hiking trail.