We stayed with Arantxa's place when it was festival week, it was right in the middle of everything, a perfect walk to all the main restaurants and bars and the old town which is fantastic for Pintxos! If you like rock music you're in luck as there is a club right outside the apartment block! Happy River Bar is great for an aperitif before you head out into the evening.
The space itself was clean and welcoming. It was perfect for our 3 night stay. Though the bed was a pull out sofa bed it was comfy. The only thing I would say is the window to the room looks out on to the apartment's balcony so there isn't much privacy, which didn't bother us but it may bother some. Also, if you're not a fan of the heat, you will struggle as the room in the summer is very warm with the blind down (which we wanted to keep out the light).
We were woken by the noise in the street but I think this was due to it being festival week, we actually didn't mind it, it only added to the charm and atmosphere.
Arantxa was very warm and welcoming and told us all we needed to know. We would recommend her place at the drop of a hat and would stay again if we ever came back to Bilbao. THANK YOU xx