Cagri's apartment is absolutely great: tidy, very clean and confortable. And it's placed in a perfect location: 1 min walking to Galata Tower, 5 minutes walking to the ferry stop for Kadikoy, 3 tram stops away from Sultanahmet, 1 tram stop from the Bazar. Even if the street of the apartment can be crowded, Cagri's apartment is very quite.
Cagri wasn't in Istanbul during our vacation, but he perfectly arranged keys pick up and drop off. He was always available by phone and whatsapp for any matter! I surely reccomend Cagri's place!