The apartment is perfectly located in the neighborhood of Beyoglu, just 10 minutes away from the central Taksim square, the heart of Istanbul where you can find everything you are looking for!
The room is inside a building in which there are other rented rooms. There are a lot of strairs so you have to be in good shape to make it up and down. It is bright, there is a comfortable bad and good Wi-Fi and AC, the kitchen Is pretty furnished but the stove and the kitchen utensil would need a replacement. The bathroom is ok but it also would need a refresh.
I hadn't meet Hakan but there is a family that live on the first floor that will help you check in, they were really polite with us and solved promptly a problem we had with the bathroom.
Hakan answered fast and helped us with the airport transfer, we paid just 30€ for a private van that took us in front of the house that is in a tiny road in the middle of a hill.
Good quality for price, will stay there again.