So I must be in the minority here but the biggest issue is people who didn't fill out the form correctly at home before arriving (arrived Tuesday).
Most of the machines had people tapping away needing help, when done correctly it simply scanned my passport, followed by my face and a green check said proceed to E-Gate.
The E-Gate did a facial recognition scan and bam, you cleared immigration in 2 minutes.
There isn't any "confirmation email" just an email that you applied for the entry form, I showed AA agent in PHL and she sort of said okay, whatever.
You can always re-check your info from that email and make sure everything is correct.
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