I stayed 1 month in the apartment and it was lovely. The flat has everything you would need. It is very close to the vibrant Istiklal street and Taksim, but yet in a quiet place. Metro is very close too. Selmin and Saygın were very friendly, always ready to help. I would recommend the place for visiting Istanbul. Selmin and Saygın, thank you very much! 🙂
P.S. Very nice city view from the window: to Taksim mosque and neighborhoods. Be prepared to listen 5 times a day calls for prayer, but it adds local color! (and you won't avoid it anyway in Istanbul)