I have a shift light and Cricket if you race your car you will love it. More consistant shifts than just trying to listen or watch the tach. I have an autometer hooked up to my 5" tach. Its directly in my line of sight so all i have to do is look down the track and not worry about the shift light
I have this in my fox and like it alot more than your standard shift light.
Multiple set shift points ( ie for staging, launching, and shifting ).
Has warning lights ( partial illumination ) for when your approaching the shift point, then full illumination at the shift point.
Has your RPMs on it.
You can change the color of the leds to your likings...