Zeynap and Sinan's place is amazing, close to everything. The place is like 3-5mins from Taksim and Isteklal street, the apartment was clean and had everything you could ask for, a lot of shops and groceries stores are around which are open until late.
Great communication, Sinan was very well in responding regardless of the timings, our flight was late at night and the check-in was super easy.
Will definitely stay here again the next time we are in Istanbul.