Eva's flat is spacious, lovely decorated, fully equipped, very clean and perfectly located.
Within five minutes on foot, you can reach main night bars area (Casco Viejo). But don't worry, as the bedroom is not facing the street, your rest will be very quiet !
Eva is not speaking so much English, but she is always willing to help you by providing for example spontaneously the directions to take with the buses.
I'm staying definitely at Eva's with my friend on my next travel to Bilbo.