Cards are constantly shuffled, or when the dealer clears up a hand and places those cards in the machine, they are shuffled back in. Not sure which. Either way, at best, when you are dealt a new hand, it is essentially a freshly shuffled 4 (or 5 deck). Every time. Every hand. They never have to stop action to shuffle, there is no "cut" card (as the shoe never ends). Casino's love them. Real players hate them. I won't play with them. Evil !