I've been using my coins at a few shopping places. I paid for a few items at Sam's club(which does not take AMEX), Dunkin Doughnuts, the local gas station and the company cafe. Everyone has taken them without a second glance. I did ask the lady at Sam's if she gets a lot of the coins and she said no because everyone just saves them. I've got a LOT of them so get ready to see a BUNCH.
LS