We (two older daughters and I) stayed in triple share room which worked well for us.
Although I hate hotel rooms which don't have a chair! But as one daughter pointed out where would you have put it
Air conditioning a bit loud but kept the room cool and it didn't bother us.
We didn't use the hostel kitchen, but you could easily cook for yourself...as many did. And the kitchen and dining areas are fantastic.
Nice roof garden, close enough to central Melbourne
Very easily accessed through Shuttle Bus service from Tullamarine