The apartment is wonderful, is very well located, a few steps from the Galata Tower.
Unfortunately I could not meet Zeynep but I was in constant contact with his colleague Ugur that solved all my doubts.
It has everything you need, it's clean and decorated with style. It has a kitchen, a bathroom with a great shower and a bedroom.
I hope to return to Istambul and stay in the same place. Thanks a lot!