We had a wonderful time in Istanbul! Zeynep's apartment was super well located for a city trip, very central and easy access. Everything was very neat and clean. We enjoyed a lot the shared terrace which has a wonderful view on Sultanahmet (and integrated sound system)! We didn't actually meet Zeynep as she had personnel obligations but the concierge welcomed us and showed us the place, and she was still available via message.
Hope to come back soon! :)