The apartment is very centrally located! You can visit most of the attractions in Sydney within walking distance or with the public transport nearby. We always felt secure in this area!
With regards to the noise issue mentioned by some visitors, neither the backpacker nor the neighbors were an issue. Most of the noise results from the garbage collection which takes place several times every early morning. So if you have a light sleep, I recommend earplugs and everything should be fine.
Charlotte is very proactive in her communication and provides a lot of detailed information about the apartment and the neighborhood with good hints for restaurants and cafes.