Had an absolutely fabulous month here in July. The location is excellent, about ten minutes’ walk from the Parte Vieja and the beach. Groceries are right around the corner. The flat itself is airy and pleasant. I only needed the air conditioning for a few days of intense heatwave. The rest of the time I spent happily reading on the gorgeous terrace and nibbling through pintxos. Martin was very communicative, his associate Tania was extremely helpful with any questions, and the flat was spotless.
The only thing to keep in mind is that in summer there are often concerts nearby that go well past midnight, and you can hear them perfectly if the windows are open. I loved the music, but if you have small children it might be a bit loud for them to sleep.