The apartment was spotless clean and brand new. It is located right at the center of everything, has good connection to public transport and still is very quiet at night, as it is located in a small side street.
Hilmi picked us up at the metro station and showed us to the apartment. Afterwards he took us on a small tour around the area up to Galata Tower and gave us some good recommendations for food and drinks.
Altogether, everything was very simple and clear.
I would come back anytime :)