well i took the plunge and bought a bluefin, turns out , they couldnt download a map for me due to the ecu encryption (2009 e90 auto) , had to take the car and bluefin to their HQ near milton keynes, they removed the ECU and enabled it for bluefin use, total cost 430 squid all in.
all i can say is, the car is a different car, much faster, more boost, more tq, should be around 210-220 bhp, and you really notice it. The throttle adaption seems to have changed aswell.
i didnt have any issues with my auto gearbox, the drive is still very smooth but much more rapid!
2009 320D AUTO PPK HARDWARE + BLUEFIN 220BHP