it is really useful.... my friend tested it in his altis 1.8 which comes with VSC..
what he did to test it was he was going in a 180 degree corner to get into a
highway... he tekan quite hard and enter the corner at a fast (but safe) speed,
the the car understeer ( he felt it for about 1~2 seconds), then the VSC activated
and kicked in (with a beep beep sound that u can hear from somewhere in the
dashboard to inform the driver of VSC activation), then the computer(ECU)
automatically reduce the throttle and did minor adjustment to the steering to
correct the understeer back to course...
but of course the above action can be dangerous as VSC not neccesarry can salvage all the consequences of the understeer if the understeer is too hard.
well, that's what i heard from my friend, anyone can elaborate more on this??