Alternator Rewire Kit Safe/Useful?

Hey folks

I saw the ZZ Performance Alternator Rewire Kit while poking around for Mods one day, and it seemed promising, but, I just wanted to ask if anyone has it and how they like it

This is the link just in case https://www.zzperformance.com/grand_prix/products1.php?id=178

I am worried about the saftly of the electrical components of the car, as I'd rather not burn anything out for a $14 mod.

Also, an aside while we're talking about electrical things, has anyone ever wiried in an electrical Kill-Switch for their GP, IE, interuption the flow of juice from the alternator to the fusebox - making it impossible to get the car started, well, keep it running...just curious guys :D