Nothing but positive feed back.
instant power everywhere
most of time when i hit it from lets say 40mph ish , Traction light blinks hahah
and this 15 degree weather doesnt help either
i can only imagine what stage 1 or even 2 will bring
2011 550i gray/cbrwn Sport, Zf8spd JB Beta tune
2008 335xi alpine white/coral red- gone
2004 745li gone