Great location - across from Southern Cross station so you can access Skybus easily.
This building is primarily folks travelling so expect a lot of unfamiliar faces and packed elevators with luggage. The fitness centre is good, no weights though, if that's important to you.
The place itself is nice - beautiful views of the sunset every night. In the summer this means it'll be very warm so I recommend drawing down the blinds to prevent additional heat from coming in.