"Welcome to Turkey! Welcome to Istanbul!"
Hikmet is a charming Turkish man, hospitable, and made sure my trip was comfortable.
He was not there when we arrived, but there were others available to lead us to the flat and get us situated. The flat is nice enough. We just used the place for sleep, late meals after trips, and watching cheesy TV shows. There is only one bathroom.
The place is a 7-minute walk straight uphill to Sultanahmet (Blue Mosque).
We liked the area for getting to tourist areas, but we couldn't find a place to eat when we got back past 9pm.
Hikmet let us leave our bags in an office after check-out which was really nice. He also arranged taxi transportation that knew the narrow streets and neighborhood.

The flat: 8/10
The neighborhood: 9/10
Hikmet: 12/10