Has anyone tested this new version of StreetPilot for Iphone... it states that you don't need cell coverage.... can you install maps from other countries such as Brazil?

Download Garmin StreetPilot® Onboard U.S.A. and give your iPhone the best in GPS navigation...even when you don’t have cell coverage. Maps reside on your device, so you can look up addresses and millions of points-of-interest such as gas stations, restaurants and ATMs without needing wireless coverage. It’s as close to having a Garmin nüvi