This is a great method for doing the Monte effect. I disagree with the reviewer who called the cards
junk. I actually think they work quite well. The cards are durable and won't wear out like typical
playing cards. The only way the spectators will notice the gimmicked aspect would be in bright
sunlight very close up if the magician holds the cards very still for an extended amount of time.
But the cards are in motion during the routine, so I can't imagine anyone ever detecting anything.