Kasia’s place was amazing! We rented the place later in the day and there was extremely quick responses and communication. Kasia’s husband Fernando greeted us when we arrived and was very friendly and gave us tons of local traveling information. The flat was about a 10 minister bus ride from town, with a stop right around the corner. The flat was huge compared to most places we stayed in Spain. There were three other bedrooms that could be rented out, but there would be plenty of bathrooms and space if that was the case, the common rooms are big! We were lucky enough to have the whole place to ourselves, but would have felt safe if others were there since there were locks on the door. I would definitely try to say here again if visitingSan Sebastián!