Hey whizz, others may chime in but we never get CMB on arrival.
It's never been a time issue for us . Usually thru pretty quick , wait for our bag and our driver is waiting for us.
Off we go.
Departures a another story. We always grab a bite and beverage anyway, so right there your pretty much at the $60 for CMB and all is included and ur in a quiet lounge and taken care of.