Fehmi was very quick at responding and very helpful with arranging us a pick up from the airport (we arrived very late at night). He greeted us the next morning and also offered to help with luggage upon check out (it's a bit of a climb to the apartment so he brought our luggage down for us).
The apartment is in the best possible area of old city. Literally a two minute walk to the Blue Mosque and Hagia Sofia. Tones of restaurant options and very safe neighbourhood. The place is small but comfortable and was exactly what we needed. Also, the walk out rooftop terrace has a great view of the water.