Everything was as described and I really enjoyed the stay. Ayda was also very helpful if I needed something, I could always text her. The location is also very good. You can walk to the Center if Beşiktaş, where you can find hundred of cafes and restaurants. The only two things that should be mentioned is that first if you wanna go to the Center of Besiktas you need to go down a hill and back to the apartment up (i mean Istanbul is made of hills so this should be generally considered). It is very steep and problematic if you have knee issues or something. BUT there is a bus that is like 3 min from the apartment which brings you directly to the Center, so no problem. The second thing that should be mentioned is, that it is a little loud every night, if you are not used to this. But this is because it is very central! Also I felt safe as a woman to walk to around this area.
To put it in a nutshell I cannot complain I had a good stay and could explore the city everyday. Thank you so much Ayda!!!