Julia's place is great for a short stay. The location is excellent, close to Kings Cross station and a short walk down to the botanic gardens. Awesome for running first thing in the morning, especially all the steps!
We were there for 2 months in transition to moving to Sydney permanently. We found the apartment was quite small by the end of the stay and there were quirks that became more annoying for a stay of this length. For instance, when it rains, the down pipes outside the bedroom window are very loud (we ended up getting ear plugs to sleep), the wifi dongle is a very expensive way to get long-term internet access, and the TV aerial is very frustrating. Again, these are things that would barely impact on your experience if it is a short stay.