In the Android space, it seems there are very few "good" nav programs. I've tried perhaps a dozen or so of them, and only two were close to measuring up. First and foremost was Google Navigation for Android. Excellent, though it relies heavily on having a data connection, making it too expensive to use on our normal limited data plans.

The other was Sygic GPS Navigation. I used the 7-day free trial period. It worked well enough for "offline" navigation, but was a bit slow in responding to vehicle movement.

Last I checked, neither Garmin nor TomTom had their own-branded apps available on Android -- with the exception of Garmin in Australia only.

The standalone Garmin Nuvi 3790 I have here worked way better than any of those, and actually appears to be an Android device under the hood.

Cheers