I wanted to get a superchip for my Mystique, but before I spend $225+ I want to know if it does justice to the V6 with an auto? I want a little more get-up-and-go! When I floor the gas peddle, it thinks for a while and then revs up. It will not spin the wheels on dry pavement (T/C Off) unless you turn them. Does it shift gears better (With The Superchip)? Is it worth buying? I plan on getting resonated catback exhaust later on. Opinions? Experiances? Let me know, Thanks.