Originally Posted by
Absolute
In reality, it has no other effect for international flights as you can't travel on a Nexus card - you need your passport.
You can't travel on it but it does come in handy when you are sent to the front of the security line of the international departures at YYZ. Saved at least 20 minutes on our last HKG trip.
Even comes in handy for faster security clearance on Rapidair flights.