I really liked to stay at Pinars place. Besides the very good communication while planning the trip i especially enjoyed the pretty and clean room, the lively market in front of the house on sundays and the good connection to interesting places of Istanbul. There are a lot of busses 5 min. walk from the house and Metrostation at Taksim. Because it is not in the "restaurat/ bar district" of Beyoglu it is quiet at night. But it is still close enough that you can walk. Thats nice. I just can advice you to stay here!