This flat is close to many beautiful places and cafes in Balat. Two supermarkets (Sok and Bim) in 5 minutes. Very close to a ferry station, which can bring you to Galata, Uskudar and other districts. There is no direct subway line to a city center, but just 10-15 minutes on the bus.
Flat was clean, a lot of light and great view on a Golden Horn. Enough of kitchen stuff. Internet is 25mb/s. More space to store clothes would be great (maybe additional small shelf).
Host was very nice and friendly, was helping with any issues. I would recommend this place if you want to research different parts of Istanbul.