I have flown with VCC and they are absolutely no different to any cabin crew that have just come to WW. Unless you have done it, you simply cannot describe what life is like sometimes living plus 11hrs/minus 8hrs and getting your rest and life sorted downroute.
I suppose you can't.
I suppose it's easier when you can bid to work your half a month in a row and then have remaining half a month off. It's different for those of us on WW (with a "computer says no" system) as we don't have a bidding system when they are working us to a maximum.