Well before we ever used this feature I had the wife stand behind the car. I drove down the drive, stopped and took my foot off the brake. Brake lights did not go out until I applied throttle. Verified twice. Pretty slick, they definitely stay on until you give it throttle or touch the brake pedal again.
It also has Launch Control (Kind of like a Drag Car Trans Brake) You enable Launch control with button, when indicator lights on dash you put foot on brake which arms it and lay throttle on floor. Goes to pre-determined RPM and holds it until you release the brake. Not sure I'll ever use it, but it works pretty smooth. Car does not hold against brakes like when you did a burn-out in your dads 68 Caprice, The car just revs like neutral, same as a trans brake in a Drag Car. Apparently holding the brake pedal is a safety feature in case the electronic unit were to fail.