Fatih is the best host. He picked us at the Karaköy and guided us to the apartment, telling us about nearest shops, restaurants, places of view, trains, Bosphorus trip ships, dondurma and all other information we need about Istanbul.
The apatment have everything you need. It is very clean, quiet and cozy. Location is perfect, close to the main tourist places (Galata tower, Galata bridge, Grand Bazaar, Egyptian Bazaar and so on).
I deffinately recommend Fatih Kaya as the perfect host and this apartment as a real charming place to stay.