We just stayed in the apartment on a 2 week work visit to Sydney, and I want to give an honest and thorough review :)
The space is great, it's large and very liveable, for any length of stay.
Communication with the hosts was great, and check-in/out was super easy.
The apartment is nicely decorated, the kitchen is fabulous, however the quality of the furnishings in the home is not amazing... The bed was very comfy, but the lounge sofas left a bit to be desired... There is not really a very comfortable place to relax after hours.
There are 2 negatives to point out, which are described by the hosts before you book, but deserve a second mention for potential guests...
1. The noise from the main road is excessive, and pretty much non-stop, even through the night. Despite the bedroom not being on the road side, the noise travels through the flat due to the older-style building. After a few nights it really was annoying, to the point of using ear plugs to sleep some nights.
2. There is no Wifi... for a longer stay this really does become an issue. Both our personal mobile data plans have been well and truly juiced this past couple of weeks! It is really strange than an apartment in Mosman does not offer Wifi!