Who knew my '09 smart cabrio could fly like a jet plane! It's totally awesome. Totally smoothes out the lurchiness of the transmissionWhen I left Smart Madness to get on the freeway, I floored it on the on ramp and just took off like I stole it. So fun! Able to quickly get into another lane when driving in rush hour traffic as there's almost no lag. I'm just crazy about this add on.