Dan Frommer on CurrentC:

When it comes to actually paying, the system gets even more cumbersome. CurrentC describes the process on its support site: You need to select a “Pay with CurrentC” option on the register, activate your phone, open the CurrentC app, enter a four-digit passcode, press the “Pay” button, “either scan the Secure Paycode that the cashier presents (default) or press the Show button at the bottom of your screen to allow the cashier to scan your Secure Paycode,” select the account you want to pay with, and then press a “Pay Now” button.

Not only will I never use this system, I will strangle the first person I’m behind in a checkout line who tries to use it.