Wonderful 3-bedroom flat. We stayed with 3 couples and it was the perfect size. Our host was quick to answer questions during the booking and check-in process.
Pros:
--Great area of San Sebastian - close to old town/food/bars/beaches/entertainment
--Quiet and very clean/modern
--Great underground market right around the corner (Mercado). Below the street you can find everything!
--there is a hairdryer (for us ladies it was wonderful)
--10-15 minute walk from the bus station
Cons:
--not enough mirrors! :) Not a problem for most but if you have several people getting ready at once it can be.