I was a hard-core user of Maps found on my Nokia E90 Communicator but each instance was like a hit-miss affair. The map data took ages to be transferred into the device and the AGPS capability on it was a shame to mention. It was painful.
Come the iphone maps, and boy, was I impressed. No map data to transfer, took just over ten seconds to show me where I am exactly. Google has done a magnificent overhaul of maps usage in my mind. The recent updates on its firmware to 2.2 now gives me hybrid, street view of certain places and open up a whole new dimension of what maps ought to be.
GPS used to work with direct LOS (Line-Of-Sight) and fails when you enter the building or tunnel but with the iphone maps, it just blow this myth out of plain sight! Spot on regardless of where you are physically located. The snazzy flip of the digital page to drop a pin adds to the final touch of a well-conceived application.