Great little apartment, super clean and modern. Great location for getting to either beach and perfectly central for hitting Old Town and Gros restaurants. On the rare, really hot days a fan would be been useful but we mostly didn’t miss the a/c. Building seems well insulated. Parking in San Sebastián can be a challenge but there is a (somewhat pricey) garage within 2-3 blocks.
We stayed in 3 professionally managed AirBnB’s during our trip and here you could really sense the care and attention to detail that comes with a property managed by the owner. Would highly recommend for couples or parties of 2.