From what I've heard...
What an average roster is like?
Prepare to be flogged! five-and-five min-rest overnights with no crew meals supplied and no breaks
What base pay is?
Well below what Eastern/Sunstate earn for flying the same aircraft
Many overnights?
Yes
The general mood of current flight crew?
They are leaving as fast as they are being recruited. Propstar has been going for 18 months or so now and still have plenty of Aussie crew filling the gaps in the rosters.
So you'll probably get a job there, if you want. They are desperate for crew.