It was a nice stay. Apartments are in an amazing neighborhood, you can find plenty of cafes/restaurants/design shops and beautiful streets nearby. This location has a great transport infrastructure. The apartments were clean and nice with all you need to spend decent 10 days in Istanbul (with a great Wifi by the way). The host was very helpful and communication was great.
Although, there were several issues which I have to say about. First of all - the third room (the smallest) doesn't have real windows, it's the windows into another room (into something like a storage room). Second of all - the floor is cold and freezy in the common area (kitchen and living room).