Everything was fine, location is great, in a quiet residential area a few blocks away from Istiklal. Organisation and communication were as smooth as you can imagine, the flat itself is nicely decorated and very comfortable. One may indeed notice groups of youngsters on the steps of the house, but they didn't make any noise, were respectful and have never thrown a single glance into the window of the flat (situated on the basement floor), so it was not a problem at all. I can easily recommend this flat and its wonderful owner to everyone who comes to Istanbul and seeks more or less authentic living experience.