Volkan was a great host. Very accommodating, genial, very easy to communicate with (both upon the time of the booking and during the duration of our stay), clearly loves the Istanbul culture and can give good suggestions on how to go about the trip.
The flat was as advertised. Clean, amenities all working, wifi was good, sheets, towels and extras were provided. Volkan was also nice enough to take care of our laundry. I travelled with my family (dad and sister) and found the flat to be very comfortable to fit us all. Bathroom may be a bit small but it's easy to get over that with the space we got anyway.
The neighborhood is a bit raw and hilly (steep in some parts - so get a good cab if traveling with heavy luggages) but very very near the Istiklal Caddesi which is basically one of the major veins of Istanbul. So that's a plus. Very near the flat also are small restaurants serving good and inexpensive local food and minimarts for basic needs.
Istanbul is a great city with nice people and amazing food. Volkan provided us a good flat to rest ourselves after a day of walking the city. Would recommend.