I stayed at Asier's place for 4 nights and I really enjoyed the place. The house is quite spacious with a nice garden and a great living room to share with others renters. The room and bathroom were quite large and very clean.
Asier was a great host, he provided me some advice on where to eat the best Pintxos, what to visit and also where to buy local products. He was very helpful and friendly. I warmly recommend his place when in San Sebastian!