Awesome view over the sea and Hagia Sophia!
The flat is very comfortable, feels a bit like being at home with alle the books, nice decoration and everything you need for cooking. And even if it's an old flat, it is perfectly clean.
Very central location, during the day it is surprisingly quiet. Around midnight some crazy dudes start driving around with their cars and really loud music. But this is probably something you can hear in the entire neighborhood. So it is not a flaw of the apartment, just a downside of this central area with lots of bars, clubs and coffeshops.
Uğur is a fantastic host who will give you some helpful tipps for Istanbul. He is very friendly and caring and communication was fast and uncomplicated.