bought one, total waste in my opinion, can't see one bit of difference, and it was a real ***** to get the thing in and the gas pedal back in the car and working again. I almost had to have the car towed to the dealer, it would not start, then after taking the thing out and putting everything back, it would not go into gear. BMW mechanic that lives near hear heard about the problem and came over and helped me do it again, 3 hours of work, and now it runs, but I can't see a bit of difference, throttle reset makes a lot more difference than this thing. Headed for colorado, with it in, probably take it out and send it back when I get home, from the rally. I know "everyone" says how great it is, guess if you are a sucker and spend that much money, you really want it to work, but I spent the money, and believe me, I don't think it works, and I was a sucker.