I decided to remap my 1.9 cdti 150 with a bluefin. R-tec are doing them for a bargain £430 at the moment so I couldn't resist it. I flashed the car this evening (took about 15 minutes once I downloaded the map). Took the car for a quick spin and couldn't stop the wheels from spinning in first and second . Big difference in power but not crazy. I can also revert to the original map if I need to for any warranty work.
The device can also me used to read error codes and immobilise the car as added bonuses.
Give these guys a call, they will post it out to you too - http://www.rtecshop.com/