As I said before I'm comfortable with my methods so other peoples opinion is moot. I've used wet face washers to wake them up since babyhood when they were newborns falling asleep mid feed.
My kids are heavy sleepers. The lights go on at 5.15am, radio alarm at 5.30am, then face washer at 5.45am if they are refusing to wake. Quite frankly this works for my brood. I'm not getting late for work cos someone else's sensibilities were ruffled. This morning I was up baking at 5am. I had the mixmaster, food processor and blender going and my kids snore thru that all.
wifey of hubby who is always away. mother of two girls who are always amusing.