The flat:
Nicely decorated flat with plenty of room. The kitchen is well equipped. There were fewer tables than shown in the pictures (we did some remote work and required a table for it). However, Zehra immediately provided us with another table after we reached out to her!
There is a nice rooftop terrace. It is shared with all the flats of the house. Only thing to keep in mind: There is no WIFI on the roof terrace.
The location:
For us the location was perfect. It is directly next to the bridges leading to the old town which makes it easy to explore the old city center by foot.
It is on the southern end of the more hipsterish part of the city south of Taksim Square. Galata Tower and the thousands of bars and clubs can easily be reached by foot as well.
The immediate area around the flat is more of a simple working class area. That means that it is a bit louder (don't forget oropax). But it also means that there are many nice and very cheap street vendors and small cafes/restaurants with great food.
The host:
Zehra was a great host, all the communication went perfectly. The checkin/checkout is contact less and very smooth.
TLDR: Great place to stay if you want to explore Istanbul!