Great place with a nice owner. Apartment is located close to Galata tower. 7-8 minutes from Sishane metro station. And 10 minutes from Istiklal street (main pedestrian street of Istanbul with lots of restaurants and shops). Apartment is also close to Galata bridge, so it's easy to walk to another side of The Golden Horn to Egypt Marketplace and Grand Bazar (~30 minutes walk).
Windows of the living room are looking to Galata tower and mosque. We thought that it will cause some problems for us and our 7 months baby, but in fact bedroom is in another side of apartment, so we haven't had any inconvenience about any noice.
In the apartment there are Electric kettle and a cooker. The owner provides tea and coffee, so it's very nice to have in the morning a cup of Turkish coffee enjoying view to Galata Tower and pedestrians walking around.