To celebrate my husband's 65th Birthday, we spent two nights in Edurne's apartment.
It is lovely and is conveniently located right in the heart of San Sebastian's Old Town. It is on a lively street but, once we closed the shutters and double-paned windows, we weren't really bothered by the outside noises. In fact, listening to the hustle and bustle when we opened the windows, just added to the experience.
We didn't get to meet Edurne in person but she was very responsive to our emails and our requests for information. She also arranged for Telmo to meet us at the apartment to show us around.
The apartment isn't air-conditioned but it is cool inside and there are fans to circulate the air if needed.
The Internet works great too!
I would definitely recommend Edurne's apartment.