The problem I have with this product, as well as Coin, is that seems to be far less convenient than pulling a card out of my wallet. Maybe George Costanza would get some use out of one of these, but I'm usually choosing between an ATM card or one or two credit cards. Plus, I don't need to worry about having my phone, charging batteries, electrical gremlins, &c.

All I'm seeing is an expensive ($155?!) solution to a non-existent problem.