Shahrzad was an amazing host, very forthcoming in her communication and very accommodating for check-in and check-out. The home is stylish, clean, spacious and a short ride away from Taksim and definitely not in a touristy area. The flat also has some nice amenities (extra iron! huge drinking water tank!).
Just as a note that when we were visiting the 5th and 6th person were sleeping on spare mattresses on the floor in the living room whilst there were two separate bedrooms, we didn't mind.