I've got the Fuze on AT&T and find it works just fine. I'm not a fan of TouchFlo, so I've replaced that with SPB MobileShell, PocketPlus, and PhoneSuite and love the speed. Very pleased with the upgrade from the TyTN II and that from my i730.

The integrated GPS works nicely and is a great addition. Garmin Mobile XT was worth the investment.