We enjoyed staying at Maialen's place for a week in July. It is central, modern, spacious and well stocked with a large terrace we used every night. Maialen and her boyfriend Beñat (and his adorable dog) took good care of us, greeting us, explaining everything, sharing great local tips and very responsive when we needed help with practical things. And by the way, it really is fine without air conditioning in San Sebastian in the summer, just remember to lower the window shades when you leave for the day, they keep the apartment cool in direct afternoon sunlight.