Ertan is a very friendly and responsive host who always replied quickly.
The apartment is very well located close to Istiklal Cd. (shopping street) and Taksim square. It has lots of bars and clubs around which is great if you want to party, but also be prepared for a lot of noise at night. The rooms look more spacious on the photos than they actually are (which is probably a common thing on AirBnB). Especially the bathroom is tiny.
While the bed is very clean and comfortable, the kitchen with the sofa might need an update.
Wifi is good and fast enough for video calls.
Overall, we enjoyed our stay as we were out during the day and only returned late.