This is a beautiful apartment, even though the decor isn’t quite as nice as the. Photo - some items have been removed.
A few drawbacks - the bedroom of this apartment is warm. There is no A/C. We stayed here in mild September weather, and a much-too-heavy duvet, and no top sheet, meant that sleeping conditions were warm, too. Windows can be opened, but that introduces a noise issue from street noises and neighbors (crying babies). If the landlords had provided lighter blankets, I probably would have been much more comfortable.
The kitchen is adequately supplied, but there are absolutely no extras, not even coffee or salt. Bring your own. A salt and pepper shaker, at least, would have made me feel more welcome.
Still, this is a beautiful, modern apartment, well-situated, spacious for two people, adequate for four people who are friendly. (Note that the bathroom is accessed through the one bedroom). It is walking distance to all the usual sights of San Sebastián.