My family of 5 stayed here for 4 nights. Great apartment on the 52nd (and top) floor with super views. It is located in a convenient part of town, 2-5 mins walk to Southern Cross Station/Spencer Outlet Centre/Coles and the tram stop, which is within the free tram zone. Many Asian students staying in this building.
Karen is super responsive and gave very clear check in and parking instructions. We arrived early and she was very kind to meet us earlier to let us park our car and leave our luggage in the apartment before the check in time. The apartment could do with some improvements like a new coat of paint and furniture, but 5 of us were very comfortable in her apartment. Two of the smaller rooms do not have space for you to leave your luggage open, so we had to put some of our luggage in the living room. Thankfully the apartment is big, so there was ample space.
Overall a good experience and I would recommend Karen's apartment!