We really enjoyed our stay at Monse's place, the flat is super cute with a lot of nice detail. We also had a very friendly welcome from her sister as Monse was unable to be there (and a bottle of wine!). The flat is in an amazing spot in the old town and perfect for bars, restaurants and the beach. Monse kindly organised a discount and ticket for a local car park so we could have our hire car nearby. Would definitely recommend this place, the flat and service were both faultless. You may or may not find some of the noise from nearby bars a problem Fri/Sat nights but they close fairly early and if windows are kept shut, you can barely hear a thing. We loved San Sebastián!