I like that they used off the shelf stuff to accomplish this. Some of it sounds like a bad idea to me, but other parts I wouldn't mind having in a car. Flashing custom messages on the rear window sounds like it would lead to an increase in road rage attacks, IMO.
i have a friend that used to live in the USA (California) for 3 years and he bought a Mustang : he is now back in France and have brought with him the car ! After a (VERY) long period of checking and "normalizing" he know have it and I've "tested it" as a passenger : good course !:)