I was one of those who sourced the original soft ware , and I wouldn't change back if you offered me £1000 for it , night and day , my real bear bug with the upgrade was how painfully it was to engage the clutch from stand still , forget winning trafic light drag races absolute no point if it was wet to . Ok it may be slightly smother at full chat but normally ish driving no differance . And as others said the double blip on change down is just glorious ! Oh by the way if you have a back problem and would like the softly campaign upgrade tcu I have one rattling around in my boot for sale