I uses a dash cam because there is so many driver out there that is bad at driving! I want to make sure if someone cut me off and hit me I have a recording that I can use to prove the accident. I'm current using 1080P cam with motion and shock sensor I got from Asia for $60 bucks that serve me well.
But does not have GPS like the one OP listed, The only feature I wish these thing have is a 360 degree cam if someone vandalize the card on the side that does not trip the shock and motion sensor (spray paint, key the door...).
Here is a review I found online
Itronics ITB-100HD | Dash Cam Talk looks petty high end!