I stayed at Fatih's apartment with 3 other people. We loved staying at his apartment. The location is great, making it very easy to either walk to Sultanahmet or take the Metro. It is located only a few blocks from Galata tower and Isitkal street making it also easy to wander about and find a good place to eat. The apartment was perfect and Fatih himself was super helpful throughout our stay. He arranged for transportation to the airport, reviewed some of the highlights of Istanbul with us and was available to answer any of our further questions. I would definitely recommend staying here.