Daniel's apartment in Casco Viejo was perfect. The place was easy to find, the room was clean and comfortable and the location was perfect, right beside the Casco Viejo metro and not far from tram ways either.
Daniel's aunt is a charming woman, sadly we didn't meet Daniel.. I suspect he was away working.
Perfect place, perfect neighbourhood, I can't fault anything and will end by saying I will visit Bilbao again and hope to stay at Daniel's place again.
Todo fue perfecto.