The apartment itself is quite nice, great location in the heart of Sydney CBD and boasts a well equipped kitchen for longer term stays, which was great (I stayed almost a month).
BUT there were two major downsides:
1) Terrible communication from host - I had a contact person for any questions and help with the apartment. After I confirmed that I'd checked in (got the keys and enetered the apartment), I never heard back from her. Half an hour after checking in, I noticed there was no wifi, despite it being included in the listing (I would be working from the apartment throughout my month-long stay). I messaged several times and she simply never responded. So I directly messaged the host account via airbnb. Their communication wasn't prompt, and a day later they told me that the actual wifi was in a separate, upstairs apartment and had been damaged. They told me to buy a portable wifi dongle and offered to take 50AUD off my airbnb fee. I told them I'd rather they fix the wifi upstairs as soon as they're able to. They agreed to this and 3 days later it was fixed. Either way, their actions were miserly and unprofessional.
2) Not very clean - I understand cleanliness can be subjective, and to be fair the apartment was generally organised, it just hadn't been cleaned properly. There was about a year's worth of dust under the bed and sofa when I checked in. If the first thing a guest does after checking in is to vacuum under the bed and sofa, it's not a great sign.
In short, the apartment is actually quite nice, just hope nothing goes wrong during your stay, because if it does, then dealing with this host will give you nothing but headaches.