Automotive rigs. Anyone using?

[mountainhouse]

I found these rigs to shoot moving cars:
http://www.automotiverigs.com/
Anyone using anything like this? Is this the best way?

[ziggy53]

http://www.dgrin.com/showthread.php?t=81425

http://www.dgrin.com/showthread.php?t=106495

http://www.dgrin.com/showthread.php?t=131341&page=2

Just to get you started.

[mountainhouse]

Thanks! :D