Ascen's apartment is truly amazing. Right in the centre of the old town, within walking distance of all the major sights.
The apartment has everything you need for a comfortable stay and is even nicer than in the pictures.
Ascen was a very friendly and helpful host and even had local cakes there for us when we arrived, a lovely touch.
I would not hesitate in recommending Ascen's place and we would certainly stay there again if we ever return to Bilbao.