Hikmet is a great host. Although we were a couple of hours late for our check in, he was still waiting for us. He personally checked us in and showed us everything in the apartment. The place was clean and tidy with all the usual amenities. A kitchen was also available with basic utensils if someone likes to cook.
All in all, the experience was smooth and we never had any trouble.
His place is located in Sultanhamet. The main Sultanhamet square is a mere 10 minutes walk. The Blue mosque, Topkapi Palace are within walking distance.
There is no parking space available and the whole neighborhood is very congested so I would advise against bringing a car.
I would totally recommend his place.