I run them in all my cars front and rear, they have saved me many times.
A guy reversed into my ML writing it off they tried to say I ran in to the back of him. His insurance said they would not pay, 10 minutes after receiving the dash cam footage, offered to pay in full.
Two boys misjudged a turn and dragged the whole side of his dad car down the steel nudge bar, his dad's new car had looked better. The lads tried to claim I started to pull out until I pointed out the cam, they changed their story then.
Caught a fatal RTA on it and the footage used in the inquest
And proved a lolly pop lady was lying when she claimed I drove through the crossing when she was in the middle of the road. She was a foot off the curb on in my blind spot, she lied to the police. Dash cam to the rescue!
My wife is a PI lawyer and dash cam footage is like gold to her.
I have caught many more crashes, I put them on Facebook to shame the drivers.