Shahrazad was a very friendly, helpful and flexible host. The flat is spotlessly clean just as in the pictures and it's spacious enough.
It's at least 15 mins walking distance from osmanbey/taksim metro stations (I think it's much easier to walk to Osmanbey station then to Taksim station)
The windows have minor problems (not all windows lock properly) and the building didn't have light during then night time.
Overall, I would recommend staying at Shahrazad's place