The location is right in Taksim, very close to Istiklal in a bustling area with a lot of nightlife and places to eat. Beirut cafe downstairs is wonderful.
Ezgi's apartment is sweetly decorated with her stuff and it gives a cosy atmosphere: this is a real person's home, not a holiday apartment and the generous price (relative to the area) reflects this. It would be a great spot to stay for a short trip in Istanbul.
For a longer stay, it was not comfortable - too many things are broken and in winter it's cold and dark. I booked Ezgi's apartment for a two-month work trip. I left early because there was no workspace and the sofa was broken.