I lived in the apartment for 34 days.
Astrid is an amazing hostess, she helped, shared advice.
The apartment is located in a very quiet place, the neighbors are not noisy. The apartment has everything for a long stay. Very cool balcony - on warm days I worked there with pleasure.
The adjacent door with an entrance is a small shop. To Taksim - 15 minutes at a leisurely pace, to the tram stop - 10 minutes, to large grocery store is 15 minutes away.
If I am going on another such long trip to Istanbul, I will gladly stay with Astrid again.