Our arrival went very smoothly and nice. The apartment was brand new and just like in the pictures. Very well equiped as well. And when we had a problem with the bathroom, it was fixed immediately. The apartment was very nicely located, right in the middle of the old centre with all the shops and great pintxo-bars nearby. The downside of that was the noice outside, which can last until very late. Closing the windows made the noice almost disappear, but also quite warm in the apartment, which is a bit of a discomfort when u visit San Sebastian midsummer like we did.
Overall we had a great stay in San Sebastian and in the apartment, it's a wonderful place with something for every kind of person!