The flat is really great. Bed is quite comfortable. Flat has an air conditioner and it saved me because it was very hot outside during my visit in Istanbul. Also the host showed me around Besiktas, gave me recommendations about how to get to anywhere in Istanbul and where to buy things I needed. The location is perfect: there are hundreds of places to eat and drink around, but it still was very quiet inside.
If I go to Istanbul again, I would stay here again.