Got 1st place last March with Autoglym on my car. Granted, they look at more than the waxed finish (originality, etc), but I felt confident going in. Not a good pix but gives you an idea.
I'm doing a national concours which is an invitational, you have had to trophy at another event prior to entering, on the 18th. I like Autoglym, but I think I can get a better look with Klasse and going to start the new prep today.