Honestly, this is the first time I felt at home when booking accomodation with AirBnb. Mustafa did all a human being can do to ensure I had a comfy stay. The room was spacious and super clean. He provided towels, shampoo and all that I need. He also offered coffee and tea. I used all the amenities I needed especially the washing machine and the dryer (this dryer is a life saver especially if you're traveling light).
The location is a few meters away from the ferry and downstairs there're plenty of places to go (restaurants, shops). It's at the heart of Kadikoy.
The house was calm, the bed was big and comfy, and the bathroom is spacious and super clean.
If you come from Istanbul Airport or Sabiha Airport, the bus will drop you 10-15 mins away from his house.
Check out was also flexible. My flight was at 00:30 and I asked him If I could stay in the house till 8 pm. He gladly accepted.
I would definitely go back to Mustafa's place. It's worth the money. Don't hesitate.