The flat is perfectly located (super central, literally two minutes walk to the beach but quiet). Asier is easy to communicate with, he waited for us on our arrival and even booked a parking spot around the corner for us.
The flat was sparkling clean, beds are comfortable and kitchen well equipped (although you might rather go for some pintxos or breakfast around the corner).
We were there in Autumn and enjoyed having good heating and hot showers in the nice Italian shower. For the summer, I would probably choose a flat with a little balcony... but that’s another budget!