[Mr Twisty]

My truck is my job, so it's logical I would have one run all the time. I can also understand why you'd just want it for accident witness (among other things) Mine isn't hardwired, I just never unplug it from the 12v.

They have changed quite a bit in the last 5 years, much more popular, and less expensive. I think I gave ~$300 for mine, but like I said, it's been plugged in continuously except for vacation, and I think I left it on more than once even then. Money well spent.

If I was in the market for another, I would look for one that the video can be read by Windows Media Player, etc. without needing proprietary software.

I agree GPS seems to be useless, unless you're using it on a track.

I prefer a small vid screen on the unit, only used to verify aim pretty much. If I'm going to review footage I want to see it on a large screen, laptop size or better.

G-meter and capacitor is a good idea, just to make sure the cam records and saves moments before, and a little after a hard impact.