Su, was a great host - quick responses, great local tips, and fantastic recommendations for pinxtos (and especially booking a table for the Friday - in a place with a great atmosphere.). She really was very helpful from many suggestions what to see (according to our interests), where to walk, booking taxis and giving us flexibility with departure - she really couldn't have made us feel more welcome.
There was just my wife and I, (so we didn't need the second bedroom) but the apartment was a nice size (for 3/4 people), very comfortable, and in a great location - less than 5 mins from both San Sebastián beaches, and literally on the door step of the old town Pinxto places. There was also (payable) underground parking just around the corner. Nice to have some essentials in the kitchen bread, jam, coffee, tea etc to welcome us there.
The top floor balcony was a really nice large outside space, although with a weekend of "monsoon" rain, we regretfully didn't get to enjoy it - hopefully another time! Would definitely recommend a stay here!