Had mine re-flashed and I do notice some improvement in the shifting. However, my MPG has increased from 36-38 to 40-44. Any correllation, or is it due to the number of miles on the car (break-in) which just went over 4,000.
It has been done, along with a new battery. The reprogrammed transmission is FANTASTIC. The new improved battery was a surprise. I didn't know I was getting one until I picked up the car.