[ghaff]

Not day-to-day but whenever I have a morning meeting that I might not wake up for or--alas more commonly--an early morning flight. If it's important and especially if it's very early, I set 2 alarms, one of which isn't "roll over and hit off" distance from the bed. I agree with those that don't depend on their phone's alarm for anything that's critical. When traveling I'll always use either the room alarm or the wakeup service if I have to get up early for something important.