We stayed at Necati's place for two nights only, so our feedback can't be the most representative one.
The location is very central and pretty quite at the same time which made convenient commuting and relaxing. We wanted to be closer to the main sights and can now be too sure that we wouldn't have found a better location. 3 min walk to Hagia Sofia and Sultanahmet Mosque. 4 min walk to tram station which takes you to the airport. Huge convenience store available just 4 min walk and a number of bars nearby.
The host responded to messages in seconds and was very kind to help on directions. Necati was very hospitable, helpful and approachable.
The flat is very cosy and convenient for i would say 5 people, we were just 4 and there was plenty of space. All living amenities were provided, such as kitchen appliances and dishes, towels, beds and so on - all clean and fresh.
Overall - very satisfied with the stay. Would recommend to everyone else.