Fatima's room in Kadikoy is a nice place. I stayed in much better and much worse places in Istanbul, inside the same price range.
I liked the spacious room, the nice view, the large bed, although the mattress was way too soft for me.
The place had an elevator, felt very safe, and the bed sheets were clean.
Fatima was also very kind to offer me a vegan dish.
The things that bothered me:
There is a nearby mosque, and when I say nearby I mean extremely close. More than any other place I stayed in the city.
The loud prayers at 4am woke me up, and also in other parts of the day it's not fun.
If you are not a smoker, the heavily smoked atmosphere in the apartment might interrupt you and "lock" you to the bedroom.
I didn't feel welcomed in the living room, and couldn't really use it for work because of that reason, so the advertised designated workspace, meaning the chair and the desk, were useless for me, and my back hurt from trying to find creative solutions in the bedroom while working.
In the very simple bedroom there was only very bright overhead lighting, which was a nightmare for me.
A small night lighting could have been so much better and thoughtful. And maybe an extender for the power, because there is only one power socket in the room, and it's far from the bed.
It also felt very hot, compared to other airbnbs I stayed at during the same temperatures.
Cleaning was Ok. The fridge was full of mold and very dirty during the entire time (although it was very spacious) it seems like it hasn't been cleaned for months.
The sliding shower door was broken during my stay,
Overall a decent stay, if those will be fixed, the place will be worth the price