the old booster is like having it in race mode, and is why most don't like it after the tune. But, I think there are other mods that have to be present for it to be insane. I have the modded mani's so my tune is a little different as well. The hopping you see or hear about is someone being light on the throttle. With it in race mode, you have to be deliberate with the throttle. Either on it, or off it if it starts to hop. The hop is actually your foot causing it. It is that touchy.