Thinking about myself and my short attention span.....
-Reduce the words. Quick and to the point.
-Dont use a particular regions ad. (Great fro the Delta, may Snub the Drakkar...)
-The larger the QR Code, quicker the "Recognizing" .
These are just suggestions, I'm no Ad Exec!
Maybe: (sorry about the size)
Or list more info on the back.
Thanks
Don