We enjoyed our stay in this nice and warm apartment. The neighborhood is calm - after exploring the city, we realized that Beyoglu is one of the best districts to stay in - not so crowded as Fatih but close to many attractions like Istiklal. Near to the flat, there are many local cafes, small bakeries (we bought awesome baklava in the bakery just across the street from the Istanberry office and tasty bread in the same building as the apartment) and little grocery shops (we liked Carrefour more than SOK).
Guener and his reception team were very helpful and responded to all questions and requests very quickly and helped to resolve issues in the apartment we had during our stay in Istanbul. The terrace is really nice, I think in late spring and summer it's very cozy for having lunch or dinner (but do not forget to close the door while going out - we were regularly visited by a cat that was looking for food:).
The biggest drawback for us was the Internet speed - it's not ok for working, especially in the evenings. When I needed to have an important work call, Guener was very nice to offer his office. But the WiFi speed in the apartment, unfortunately, wasn’t as expected and we mostly used roaming for communication.
All the other minor issues that we had in the apartment were resolved very quickly by the host. Thank you for the hospitality! Wishing you all the best!