We had a brilliant stay in San Sebastian at Elena's place - check in and communication was easy and Elena was a friendly helpful host. The flat was clean and as described - simple but also at a price you rarely find in a central area of the city.
Antiguo is a great area with loads of bars, recommend the one by the fronton court for cafe and a pintxo, and a short walk to the Ondarreta beach (my favourite one to swim in).
Thanks Elena and all the best!