I'm very impressed with how well the nav app and voice search works. Fire up the Maps app, hit search, then the voice search and speak the full address of the destination, tap it and navigate. No typing at all.
To make it even easier, I changed the action for double-tapping the home icon. Now it brings up voice search. Do the same search for the full address and select Maps as the app to handle the search result.
It's helpful that the maps app is able to turn on/off the GPS as needed.
Also nice to have the 'report problem' option on locations. Lots of times the location isn't quite right (several houses off from the actual location). Now you can report it more conveniently. (Don't know if fixes will happen any faster, but at least you can contribute in an easier fashion).
Pretty darned impressive.