Loved Kay's apartment! I stayed there with my brother while we attended the Sydney Film Festival, and it was perfect for getting quickly into the city - North Sydney Station is in walking distance (12 minutes), and it's easy from there. The flat itself is very quiet, clean and comfortable, and we slept really well. But the real beauty of the place is the harbour view from the master bedroom and the lounge-room/balcony, especially of Berry's Bay. Kay was a great host - she was overseas during our stay, but still in very quick contact if necessary, and left a friend nearby to help in case of emergencies.
I would definitely stay there again!