This a great place to stay in Sydney.
Centrally located, public transport just around the corner (Town Hall), Darling Harbour 5 min walk, Circular Quay about 20-25 min walk. Takes a minute to get Uber. Plenty of places to eat around Darling Harbour or in Chinatown. There is Woolies near Town Hall if you need some groceries.
The place is spacious and great for a family of 4. Two bathrooms are a bonus. Kitchen is small but relatively well equipped. You are placed in the middle of the city so there is a bit of traffic noise, but nothing major. Entry to the building is secure, so is the lift to the 7th floor (need to scan a key), and the neighbourhood appears to be pretty safe.
The entire place was very clean, AC was efficient, the balcony is OK (only one chair though, photo shows two), but we had no opportunity to sit outside anyway. There is a handy folder with recommendations (restaurants and sights).
Overall, recommended. We will definitely consider it again while visiting Sydney