This is a great apartment - bright, modern and comfortable (and with great showers) - in a lovely neighbourhood (very close to the cathedral). The street outside has loads of great eateries (Old Town coffee is ace, as is Txotx Gourmet) and a lively bar scene outside. Despite the proximity to the bars, the bedrooms are super peaceful (everyone slept well). It is a short walk (10 mins ish) to the old town & to the beach.
Great host & easy comms. This is a great base for a stay in San Sebastián.