We liked Simay's place and had a great stay, but there were things that could be improved in the interaction with the host and in the apartment.
The place has an amazing view and is situated in a great neighborhood with plenty of cafes, restaurants and bars, and close to many points of interest in Taksim, Beyoglu.
The apartment is spacious, but you can tell that it is a place that was rented to put it on Airbnb, so it is a bit sparse and sometimes lacks basic utilities: We missed dish towels and tabs for the dish washer, kitchen utensils are pretty basic.
In the amenities of the apartment it said that there was an AC but we found out when we arrived, that there wasn't. So in the first days of our stay, an AC was rather hastily installed, with several visits (and inconveniences) of workers and the host. Once the AC was up, we let Simay know that it was making quite some noise, so the workers had to come back to fix that. We needed to ask for a cleaner to come to clean the mess that was created by installing the AC.
Simay was very fast to respond and tried to fix things on the spot.
Despite the issues, we really liked our stay in Istanbul!