I tried once to use it at the McDs drive-thru... NEVER AGAIN. They had to swing the whole CC-reader terminal and hang it out the window for me to reach my phone out to complete the transaction. Then it took three tries for it to work. It's so much faster to give them my card, have them swipe, and be on my way. I've had no issues, however, using it places like Walgreens, Staples, and Home Depot.