this is supper cool and works well for getting fotage of club drives and track days
I have see first hand how well they work on a track day, you can place them any where on your car inside and out
Cameras are awesome I have front and rear mounted cameras and can hook them into laptop it awesome going for drive around hills with flatmate who has them also recording with me in front and vice versa also looks really cool when playing back on screen in car driving around with mates they dont know what to think
chasecam / traqmate stuff is pretty good, almost bought this myself but realised i wouldnt use it much... its still good value for money i reckon though