Got it in, swapped it out quickly, fired right up. Now, I guess with the added shift pressure, the trans responds quicker, and isn't sluggish. As I used to punch it at 30 and it would have lag, now it does not. Another reason how i know is, when i cruise down a big hill in neutral, and go back into drive, it's instant, as my with my Z4HO, it would take prob 5 seconds to get back into gear. Shifts at 6500, and also my gas mileage went up, not down, well as stated on the message center readout. I also believe my miles to empty, is corrected now. Performance wise, not sure, but didn't expect much from just a swap of the computer. Overall, I am pleased!