The apartment/hotel was in the middle of the heart of the old city near Sultan Ahmet with 5 minutes walking distance to Hagia Sofia and the Blue Moskee. The flat was very cozy and mr Farouq was fast answering any questions and even providing some tips. He is a good guy! We had some problems with the internet, but if you switch of the router for a second and on, it works perfect.
Would definitely book again!