We a lovely stay at Xabier's apartment. It was great value, very clean. Very easy to get from the centre of San Sebastian by bus or train (about 15 mins, just get the number 9 or 29). Xabier was a very helpful host, was always available to ask questions etc. One thing though is that there are very few resturants and shops in the area so you will have to eat in town, but otherwise great.