I was also in two minds about whether car cams are worth it as evidence in a claim or court of law, but after talking to my sister-in-law who works for a large Insurance Company dealing with claims every day, they are taking more and more notice of good quality footage from decent car cams and they are helping to settle claim's quicker with the evidence they provide.
And after a recent very close call with a van driver who was too busy fiddling with something in his footwell, drifted into my lane and missed me by about a milimeter, ive just ordered two of them and spare mountings for our cars after a lot of research of which to buy. I decided to avoid the real cheapies and went for something that has good footage at a reasonable cost and had a lot of good reviews in real-life use.
I went for two of the Mobius wide-angle cams, brought direct from the manufacturer to avoid the copies.
Very good long-running thread on Pistonheads about them -
http://www.pistonheads.com/gassing/t...t=Dash+Cameras
Just work from about 20 pages back from the end for the latest info and thoughts.
Also here is invaluable resource for choosing which to buy -
https://forum.dashcamtalk.com/