Our family had a great stay at the place. Ferhat is a nice person, who is available for help and responds to any question within minutes. Likely that was my best interaction with an airbnb host so far.
The place itself is conveniently located next to the Galata tower. It is a little small for a 4BR by American standards but has everything needed for a short stay. One night was a bit too loud and sometimes smoke from the restaurants outside gets into your room, but that's the price you pay for staying in the center.