Our stay in the apartment was great. Conveniently located near supermarket and many pintos bars we had the choice of eating out or self catering.
Unfortunately our flight into San Sebastian was diverted, hence our arrival was not to plain. Given this we used the self check which was very easy.
I would recommend if you have large, heavy cases grab a taxi either from airport, train or bus station, it will be less stressful. We taxied from bus station, stopping by grabbed the key and then headed to the apartment all in the one trip which really didn't cost that much.
We made use of the fully equipped kitchen, including the washing machine. Sun deck was great to relax with a pre dinner drink.