We enjoyed our stay in San Sebastián. The apartment was clean and modern. The location was great - just a couple of blocks from the beach and only a few minutes to Old Town.
There was quite a bit of construction going on but we understand that is outside of the host’s control, and it was only during business hours.
Our only complaint was that it was really hot and the a/c did not work well. The bedroom stayed really hot and we ended up sleeping on the pull out couch to try and closer to the a/c unit.