Me and a friend stayed at Gabrielle's place for about a month. There were pros and cons. The pros were that it was relatively cheap compared to other places in the same area; the neighborhood was very nice with lots of shops and cafes nearby; and Gabrielle was very helpful when we had questions or requests (including the time we locked ourselves out!). The cons were that there was basically no privacy between the two levels of the apartment (we misunderstood the layout from looking online); the keys were difficult to manage since you need a key to get in and out of both an inner and an outer courtyard door, which is hard to coordinate with two people with separate schedules; and the place itself was okay, with the basic amenities (other than a coffee maker), but it was far from a pretty or enjoyable space to just hang out in.
If I were coming to Sydney with two people who want to sleep in separate beds, I would stay here only if the price makes it worth it to have very little privacy. That said, it was a very good price, so it might be worth it.