My stay at Casilda has been nothing else but perfect.
Casilda and her daughter are perfect hosts, always attentive, incredibly kind and very good at recommending things to do in san Sebatiàn.
The room itself is lovely decorated, everything is spotlessly clean, the terrasse is perfect to enjoy your breakfast (that casilda prepares for you with fresh orange juice every (!) morning).
The location of the apartment is also just perfect. its very much central, and near a lot of bars so you feel very safe and can enjoy your evenings without having to walk a long time home.
I will definetely stay at casildas place the next time I am in San Sebastiàn.