While there’s a generic AC thread about clearing YYZ immigration that’s T1 and AC related ...

And I’ve seen a number of posts about how immigration pre-clearance isn’t too bad for those with Nexus...

But I don’t have Nexus, and have to clear US pre-clearance through T3 next week. So am wondering if anyone has experience of just how painful this is going to be.

Is arriving at the airport around ~3h before my flight sufficient? I normally aim for 2-3h for US flights.

I will be checked in from previous day as long as there are no technical issues, and do not expect dropping my bag to take long.