I stayed with Columba and her mother for an extended period and had a wonderful time. Columba is a very good host, helping me to practice speaking Spanish, pointing out things to see and do, and discussing Spanish culture and politics. The apartment is located in a very nice neighborhood with many panaderias, bars and restaurants nearby. The beach is within easy walking distance with the best ocean swimming and kayaking. It is one of the few places I have visited where one can walk into the sea and swim for a long distance, which I tried to do every day.
The bed was very comfortable and the room was absolutely quiet and clean with fresh linens. It was a pleasure having coffee and breakfast on the balcony.
I would recommend Columba's AirBnB to anyone visiting San Sebastian.