Dash cams ... I welcome your thoughts and experiences regarding dash cams. Worth it for documenting incidents (and near misses)? How easy for a handy person to install (or leave it to the pro)? Just one for the windshield, or another looking out back? Nissan has an oem dash cam that can be installed in the Ariya -- for those who went that way, how does it perform? There's a super tiny Garmin that's unobtrusive, how does it compare? There's lots of articles on the web comparing all kinds of dash cams, I'd be interested in reading the opinions and experiences of my fellow forum members.