[JoeAltmaier]

That's a reasonable scenario. But not the one I experienced. My history is of waking up seconds before the required time.

[henrikschroder]

For what it's worth, I have the same experience as you. I wake up, once, maybe a minute before the alarm is supposed to go off. And I'm immediately clearly awake, not groggy, not sleepy, no gradual slow awakening.