Me and my wife lived in Igor & Letis fantastic apartment for three weeks in May and June, and we had a truly wonderful time there.
They are really nice people who showed up personally for check-in and provided tips for our stay in San Sebastian.
The apartment is very close to the Zurriola beach, with a lovely ocean view from the private terrace at 7th floor. The Gros neigbourhood is highly recommended if you want to experience more authentic Spanish daily life than what the old city provides. The area aorund the apartment is packed with small shops, bakeries, fish/meat-dealers and pinxto bars.
Inside the bright apartment we lived a very comfortable life for three weeks. With a comfortable bed, stove, washing machine, dishwasher and a quiet and effective aircon, everything was perfect.
In short: Higly recommandable, and we would love to go back soon.