I had a really great time in Istanbul living at Sertac's apartment. The best thing about it is the location, which is easily reachable from the airport and close to the metro station. It allows you to enjoy the magic of the city without wasting too much time on commuting. The apartment looks exactly like on the pictures and I had everything I needed for my stay. Sertac is a great host and was always helpful and responsive. I can genuinely recommend you staying at his place.