The app worked great, like having your own personal guide. It came on automatically (used Ipad with cellular) and switched easily from our music playlist to the commentary when we came to one of the tour points. We only had to reboot the app once after a stop at a rest area and it quickly picked up where we left off.
The commentary was informative and entertaining. Well worth the purchase.
Ice fields baby about Icefields Parkway GyPSy Guide, v1.4