I stayed at Hazal's place for 7 nights with my friend, and everything was pretty much as expected.
First of all the communication with her is fantastic she replys right way and very helpful.
The place is hers! She lives there, so you can expect to see all her stuff around the house, it has everything, the kitchen is complete, and the living room is very comfortable.
It is a pretty big flat, and the garden is lovely but I, unfortunately, I didnt spend time, is probably nice to host a romantic dinner there.
I only left because she doenst rent for longer days, and I wanted one month, but next in Istanbul if the shorter time I will reach her for sure.
About the location, this is my favorite neighborhood in Istanbul a few things to notice, is hard to get a taxi near or by the app because is a very popular area so the drivers try to get extra money from the passenger. And there is quite a hill to go up in case you want to get the metro ( which for me I could use the cardio lol ) but maybe if you have special needs it could be difficult for you.