My stay In Fatma’s house was both comfortable and nice. Her and her husbands house is a very cozy 19 century home, typical for the streets of Beyoglu. Sadly I didnt spent too much time in my apartement, since there is just too much too see both around Beyoglu and in Istanbul in general. My ground floor room was cozy and exactly as advertized - although the streets were quite noisy and the windows didnt seem to insulate very well the nights in my apartement were comfortable.
The Bathroom is a shared one, so you have to walk through the hall to get ready and shower. This is the only issue I had in points of comfort tho, which is why I would definetely recommend Fatma’s Airbnb to any Istanbul visitor.