Great place to stay in Melbourne CBD! The view from the 74th floor is amazing (the photos don't do it justice). The apartment is a bit more spacious than you would think (from the photos). The bed is very comfortable, the walk-in shower just great and the kitchen has a large fridge, a gas stove, toaster and microwave, which are perfect for having a few meals from the supermarket (2 really close, by the way - Aldi just around the corner and Metro a couple of blocks up, towards the center).
The location is unbeatable - in Melbourne CBD, but near Queen Victoria Market (which you must try on a Wednesday night - for dinner - if you have the possibility!). The tram stop is close - a couple of intersections up the street. And everything is trully within walking distance.
Kathy is very responsive and ready to help (we arrived early and needed to leave our luggage in the apartment before checking in, and she arranged that.