There seems to be one big disadvantage to the paper receipt concept. Once you cash out of a machine you must take your receipt to the cashier to get your money. No longer will people just move to the next machine and put the money back in(unless the machines can read and accept the receipts). I move from machine to machine when playing. If a machine is "cold" I don't stay long. The paper receipts seem to be taking some of the fun out of the slots. It could be the death of them.