I stayed in the flat for 3 nights.
It was a nice and tidy flat. I felt comfortable really fast.
Also the area around was good. A lot of restaurants, supermarket and bakerys around.
Also the Metro and the ferry are reachable with a short walk.
Poyraz answered really fast on questions and he is very friendly.
I enjoyed the stay there in Kadıköy and in Poyraz' flat.