I received a message from Delta on my departure from JFK last October. They’re offering a similar time slotted security in terminal 4. I went to read reviews online and they were mostly positive.

’Unfortunately’ I haven’t tested it myself as I now have TSA Precheck which already cuts down security to less than 10 minutes.

Seems like a great initiative though! Especially if you don’t have checked bags. I’ll ask my partner to try on his trip out of AMS next week.