A great apartment with everything you need for a stay in San Sebastián. Damaso is super helpful and went out of his way to make us feel welcome and get settled, even going across the street to the nearby parking lot to sort out (inexpensive) parking with us.
While not right in the old town (it's maybe a 10-15 minute walk), Damaso's place is a few blocks from Zurriola beach and all that Gros has to offer. We'd definitely stay here again.