Nice location in a suburb of San Sebastian. You can take a bus (10-15 min), that drives often, or walk (45-60 min). I would recommend the bus.
The flat was very clean and spacious. It is a little bit keen if hearing, but if you just stay over night it is not a big deal, as it is silent in the area. But our neighbours entertained us very well having fun with an awesome stamina ;) so be aware! ;)
Nice and friendly hosts, would definitely recommend it and give 5 stars to the location