I use airbnb since many years and so far this has been the best hospitality I've ever received. Loyola is very kind and shared with us plenty of tips and tricks to fully enjoy San Sebastian. We trusted him and we did not regret any of his recommendations.
I stayed at this place for 3 nights in a trip with my girlfriend. Clean and cozy, very comfortable and well located. We walked everywhere and in max 25 minutes we were at the farthest beach from the apartment (the closest one being only 10 minutes away on foot). If you don't want to walk there are several options for public transportation, but we never used them. I appreciated the covered private parking spot. I definitely recommend this airbnb.