We had a great time staying here as it was so convenient to the city. The view was absolutely amazing and get our children occupied with "eye spy" for hours and we adored the even more amazing view from the 67th floor pool and spa which we often had to ourselves.
This is a comfortable space for 4 people and fine for 6 though the 3rd bedroom does not have curtains so light may be an issue for some.
I would definitely recommend it if you want to stay in the middle of the action in Melbourne and feel like you are living the high life.