We really enjoyed staying at Kaan's place. The location is ideal and very very convenient, as the metro is right downstairs, behind the house, and you can even walk to Taksim, or the Galata tower. Really great location. Also the view from the apartment is also very beautiful.
However, be warned that the apartment is on the fifth floor and there is no elevator, and the stairs are very tiny so bringing luggage upstairs can be quite cumbersome. Other than that, we absolutely loved it. Thank you Kaan and Suay!