One thing I didn't know until recently: You can send a Zumo back to Garmin for an 'after warranty' repair. They pretty much just receive yours and send you a refurbished unit. It's $150 for a Zumo 550, which does navi, xm radio, xm traffic and weather, mp3's, shows your caller ID, Dials your phone, and I'm sure I'm missing some. I'm really amazed with it. Then, you can move it all to your car and have the same stuff there. Pretty cool.