This apartment was nice enough, but a bit small for the price - it was a tight squeeze for 5 adults and a toddler. Living room was very comfortable and roomy. The outdoor patios were nice to have. Location is close to old town and walkable to lots of restaurants and bars and the beach, but it is up a hill so could be difficult for some people. There were some items in the kitchen but no oil, salt, pepper etc, which was a little inconvenient. The AC unit is in the living room so it keeps that room very cool but the bedrooms stayed much warmer (which made it hard for my toddler to sleep as we were there during a heat wave). We also ran out of toilet paper, laundry soap and dishwasher soap about halfway through our stay and were told to buy our own - not a huge deal, but seems strange for a 2 week stay.
Overall this stay was fine, but not amazing. San Sebastián is very cool though, and hope to return someday!