Hikmet was very accommodating, e.g. offered a pick-up service from/to the airport which was very convenient, also provided us with a map of the inner city.
Since we were five persons, the flat was a great alternative to hotel accommodation, also had a daily cleaning service, dish washer and WLAN.
From the flat we could reach the area around Hagia Sophia or the next Tram within 5-10min walking.