Very great listing and Guner-Berivan's hospitality was top notch. They let me store my bags as I had to go on a tour before check in time. They helped prepare for my travel and helped when I needed to print out a document. The appartment itself is super clean and had all the necessary amenities. They even had some snacks available and breakfast which I was not able to experience with the little time I had.
I stayed only one night and wished I had stayed longer. It's in a quiet place and you will really be in a local Istanbul neighbourhood. Only thing is it's not immediately close to all attractions but that wasn't a problem as there were countless buses going anywhere in the city not far from the apartment.
Thanks again for going above and beyond.