I had the Bluefin on mine before I sold it and was always very satisfied with it. It was definitely quicker (as you could tell when I took it off before the car got part exed) and it maintained my interest in the car. Mine was also not modified in any other way so I don't doubt I could have got a bit extra if I'd done the usual exhaust, air intake mods.
However, I also once got taken out in a fellow member's Revo'd Mk6 and this was clearly much, much more powerful and more aggressive. I suppose it's each to their own. I liked Simon's description of Bluefin turning the car up to 12 - it sort of suits its linear nature.
Sadly, my Bluefin is now sat under my desk in its box. waiting for a car to be used on!!
