I am very happy that I was able to find a place like Raven Istanbul.
I stayed there for three nights.
The room was exotic and beautiful, Serap helped me book a ticket to Ankara (which was difficult for non-Turkish people to reserve), and the place was convenient for sightseeing.
Even my Turkish friend seemed to love the place after I told her where I had stayed.
I recommend the place to everyone who's visiting Istanbul.