Hatice's place is in an excellent location. It is a 5-7 minute walk from the metro, 3 minute walk from a major bus stop, 10 minute walk from Galata tower, 10 minute walk to the ferry, about 10-12 minute walk from the tram (which takes you straight to the Blue Mosque, Hagia Sophia, etc.). You can get almost anywhere in Istanbul from her place!
Hatice is also a wonderful host and she answers any questions or inquiries promptly and respectfully. The view from the living room window is amazing and the amenities help a lot (wifi, kitchen with cookware, washing machine, drying rack). It is a great place for 2 people to stay. I absolutely recommend staying at her Airbnb.