I've got a TyTn 2 running I-nigma...
The QR code doesn't register on my phone.
That said, being Australian based, why bother with QR?
No one here uses them. Hell, phones don't even come with the software, and the only company that even provides the software directly is Telstra.
That said, if you're going to try and push to get them out there, more power to you. I think QR codes are a fantastic idea... just need to be integrated directly into the camera functionality on a phone so you can press the camera button, instead of having to open up the program.