Easy interface with vendor. The instructions prior to flashing were timely and easy to understand to set up Flexihub prior to the install. IN vendor is friendly and helped explain things during the install activity. Further appreciated vendor noting should dealer overwrite changes, you just need to reach back and reschedule another install session. The session itself lasted about 15 minutes so quick and easy. And yes, the changes were noticeable immediately when I drove the car that night. Thank you