Omex rev limiter with launch control

Just flicking through demon tweeks catalogue and came across an omex rev limiter that has a launch control (of sorts) facility - a seperate button that activates a lower rev limiter to reduce wheel spin - anybody used one? any good or is it a clumsy thing when it kicks in?

I dunno my self but i am interested in some kind of set up for my project. My 172 shafted my mates mk3 vr6 because he couldnt get the power down.

all it will do is retard the ignition making the car pop and bang at a desired rpm when the button is held once released the car will just spin up unless you have a lsd diff

the down side is that while its retarding the ignition the manifold will glow read and probally not do the engine any good

you play with the plus and minus buttons and it sets a limit to the revs wen the button is pressed and then back to normal wen button is reliced. got one in 1/4 mile car, it worked fine till i snapped the wire in the switch