Handan is a wonderful host. The first time I visited Istanbul I think I missed the window to write her a review, so Let me tell you she's amazing.
First she's a professional translator. Second, she even had an extra cell phone I could rent for duration of my visit (since my phone didn't accept international sim cards) and met me at the start of my trip, even though she was going to be the third place I stayed. Third, even though it's not a standard thing she offers, I was lucky enough to learn a recipe from her when she was preparing for a potluck. She is an excellent no-fuss cook.
The room is lovely and comfortable. The view from her balcony is amazing especially from the living room) and I loved watching the morning pigeons. Also get building has an elevator! You're still up a flight of stairs once you are in her flat, but one flight is much better than all of the flights of stairs with luggage.
It's easy to get to the ferry. And the fish market on her side is superior (said with all partiality and only a small tourist amount of experience).