I would definitely recommend this place if you're only staying a few days in Sydney and doing mostly touristy things. If you're staying a bit longer like I did (month) I would suggest another place.
Pros:
* Most appliances are quite new (except maybe the fridge)
* Quite close to public transit (bus 431, light rail)
* Quiet neighborhood
* Huuuge 4k TV
* The host is fairly diligent in trying to solve problems (though not always)
* Comfy shower
* Nice views when you climb to the rooftop
Cons
* The apartment has virtually no natural light. There are no windows, and the entrance door, which is already behind a staircase so doesn't get much light in the first place, has frosted glass in addition to a double layer of metal grids. This alone makes the apartment a very depressing place to spend time in -- which isn't necessarily an issue if you're only back at night to sleep, but a bit more if you're staying a month like I did.
* The unit has been separated out from other parts of the house without much noise insulation, and in some places (blocked out door next to the fridge), basically no insulation at all.
* Fairly annoying beep exactly every 15 seconds at night coming from behind said blocked door (which wouldn't be such an issue if there was at least some insulation). The host didn't seem to try to address that issue after I mentioned it early on and sent an audio recording.
* The internet can be a bit of a hit or miss. I eventually reused the wired connection used for the TV which worked most of the time, but for some reason I couldn't get anywhere with the wifi using any device that I tried.
* No sofa or comfy chair (four dining chairs and a simple desk chair).
* A bit lacking in terms of a amenities. Since I was staying for a while I went to Ikea to get a few things, some of which I'll leave in the apartment in hopes that future guests may benefit. For instance: chopping board, more cutlery, large drinking glass, cooking pot, second towel, tiny desk lamp, etc.
* Upsell attempts (first time I've seen a list of "minibar prices" and items in an Airbnb -- had to put all of them away to get back some space in the fridge and on the dining table, then put them back carefully by fear of getting charged extra).
* The second level isn't bad but you can't do much more than sit up in bed before hitting the ceiling.
* Two single mattresses; no bed frames.
Some random suggestions:
* Not a whole lot can be done about the light, but I do think a couple of things might help. Change the main door into normal (not frosted), add blinds for privacy; use a single door instead of the light-eating double grided thing. Maybe the blocked door behind the fridge could be changed into a better insulated tall window to let in some light (frosted glass is privacy is a concern) and block noise.
* Find a way to get rid it dampen the every-15-second beep.
* Dish stand to let dishes dry would be nice. I would suggest that the host tries to cook dinner once in this kitchen to quickly realize what might be missing in terms of utensils as well as basic ingredients.
* Add a simple sofa or similar. As it is, it seems like the TV is only here to be watched while eating at the table?
*A little more testing of the WiFi reliability throughout the day and with a sample of a few different devices.
* Leave the table and fridge empty ("minibars" are for hotels). Or leave them stocked with some things but the contents are free of charge (I'm a host myself and usually stock the fridge with some soda cans, water bottles, etc.).