The pension is easy to find, and staff are very helpful. Beds are comfortable; coffee and tea are available; everything is clean.
The only difficulty might be is there is only one bathroom for all the guests. We were here in low season, so didn't have much difficulty, but I can imagine problems in the high season.
The pension is in the old part of San Sebastian, so visiting the most picturesque parts is easy, as is visiting nearby villages.
Local food is excellent.
I highly recommend this pension; excellent value for your money. It's the best base for exploring this part of the Basque Country.