We loved the neighborhood, The flat is located in the center of Kadikoy which we've absolutely loved.
The apartment is nicely decorated, and as stated it's old so things can break. We had issues with the washing machine.
Wifi and AC work perfectly well.
One bed is very comfy and the other one is not.
Host can take some time to reply back.
And the bathroom could be cleaner.
Overall, for the price you pay it's worth it.