My wife and I used Yago's apartment for two weeks in late September. The apartment was modern, spacious and very comfortable. The master bedroom, the lounge area and terrace all had lovely views of the beach and yacht harbour area. Lovely to watch to sunrise with a coffee. There is also a private drive for your car if needed.
There are 4 or 5 restaurants/tavernas within 5 minutes walk, although a very steep stair climb to most.
You will need to be OK with walking and fairly aerobically fit, or, get a local taxi.
To get to the main town area it is a 20 to 30-minute walk to get to the various areas including the buzzing central area and the old town. There are lots of restaurants, bars and Pintxos - Our favourites (cheaper to expensive) - Ardoka Vinoteka, Gran Sol, Arroka Berri, Restaurante Jaizkibel. We didn't get to go to another half a dozen restaurants as some were starting to close completely/partially end of September. However, it was quiet compared to peak Summer months, so we didn't have to book for most.
Hondarribia is a great central location for driving access to the whole Basque country - Bilbao (105 mins), San Sebastian (30 mins), Saint-Jean-de-luz (30 mins), Biarritz (50 mins). We took the car ferry from Portsmouth to Bilbao. The food in the area is simply fantastic and varied.
Yago's apartment was just what we were looking for :-)