We had 5 nights in San Sebastian and enjoyed being a short walk to the beach and the old city. The apartment was well-equiped and had comfy beds. Internet speed was a bit slow and on some nights the neighbours were noisy till after midnight.

There is limited free parking nearby so you have to be lucky. We parked in parking station for about 36 hours and it was 48Euros. Probably better to stay at this place without a car.