I don't have an ACW but I can say that the printer on our ATM has worked flawlessly for about 29 months now. But then it is in a dry more room temperature area within our adjacent laundromat. We are not talking the same machines but on the ATM like Sam's Club gas pumps it give the customer the option to print or not to print a receipt. Based on that limited oranges to apples experience ... I would say that there is a percentage of customers who would prefer to be able to get a receipt not only on the ACW but possibly from in bay card swipes. Theoretically, there could be 2 car washes in the same vicinity ... one offers the option of receipts ... one not ... & possibly it could negatively affect the total revenue stream for the one who does not have that option.
mike