Nextar Q4 GPS Navigation System With MP3 Player
My first and foremost complaint about this unit is that the battery doesn't last for more than 20 minutes at a time and never did.  Since the battery won't last, I have to set the clock everytime I want to use it if I want to estimate time of arrival.  But the clock settings are not in the navigation section.  So, you have to get out of navigation (which shuts the navigation down--you can't go right back) and go to settings.  Then the navigation has to start all over again.  Not fun while you're driving.  I