TLDR;
If you need to work with an internet connection, this flat is not proper for you.
My wife and I stayed in Hatice's accommodation for one month.
The flat is on the first floor and relatively small. It could feel cosy.
You can find what you need. In a tiny kitchen, you can find whatever essentials.
The flat is near to the centre. So you would hear many parties or concerts along the night. (It's Istanbul!)
The biggest problem for us was the wifi condition. Maybe the host installed the main wifi device in the building's other part (or room). The signal of the main wifi is hardly reached the living room. Though we were supposed to use EXTENDER of the main wifi, we could not use it because the "main_wifi_EXT" has only a strong signal without an internet connection. I guess the extender needs to be installed much closer to the main one.
Anyway. We spent a month with no wifi connection. Understandably, we had to top up our sim cards twice. And in some cases, we had to find a wifi-ready cafe for the internet. We reported to Hatice about this problem, and she said "It works. I don't get the problem." and she suggested using other wifi which does not exist.
I know she runs multiple accommodations in AirBnb and this flat is not the finest one she needs to care for. We had faced other problems like boiler error or black-out and she managed those well. But the way she treat the wifi problem was disappointing.
I hope the guests in the future would be able to use the internet.