When I perform I use multiple decks of cards. In my stand up I use an invisible deck that remains in full view the whole time as well as 2 decks of cards in an effect that I do. In walk around I will load my self up with a couple decks of cards and most the time I'll do a couple tricks with multiple decks of cards. I have never had a problem with multiple decks of cards. I think this is interesting because as I have been trying to spread the word about an effect that I'm putting out the most common problem that magicians have with it is that it uses 2 decks. They agree that it is strong, and that it is a beautiful effect but they are hung up at the fact that it uses two decks. Why is this? Why do magicians get turned off by a trick that uses 2 decks?