I have a Garmin nuvi 770 with lots of features and I use it for commuting every day. I have a long commute but obviously I know the way.
. However:
1. It's an mp3 player using SD cards, so I get much more choice and convenience than CD's.
2. It's a bluetooth hands free connection to the cell phone in my pocket.
3. I use various foreign language settings so it's giving me language lessons.
4. It warns me about traffic problems on the highway and helps get around them.
5. I like the maps showing where I am, and the predicted arrival time, which is amazingly accurate.
6. It reminds me to make turns if my mind wanders.

It's great! The only thing that was a wash out was the fm transmitter to the car radio, there is no empty frequency for it to use well.
Source(s):
I use it every work day.

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