I've been reading a little lately on Jet and Venom chips for my car. I've even seen a couple on eBay from (what appears to be) reputable sellers. I'm wondering if anyone has ever had either, on any car, and what your result was. I'd really like something I can switch off (i.e. back to "before i put this on") and switch on when I need it. If these are just overpriced (and overhyped) pieces of shit, then I'd love to know that as well. I'd never make a purchase without finding out first TIA