The video posted on FB is a nice demonstration of the efficiency of the system. https://www.facebook.com/1428733792/...7955871440488/
Also, I had the opportunity to be in Race Control during the first race at June Sprints yesterday when one of the cars that was using the Flagtronics was involved in an incident. The unit triggered the G limit warning and when the driver did not respond the emergency crews were promptly notified and the course went to a Double Yellow, ultimately to a BFA. Fortunately the driver was ok and the race was restarted. With the units in all of the cars it will be much more efficient allowing Race Control to deploy a code 35 (all cars assume 35mph) so that clean up can begin immediately without getting all of the cars gathered behind the pace car. It may also help in some instances where there are split starts followed by a FCY to allow the groups to maintain their split.