We have eaton vorad, and I have yet to see any bugs in the system. It works great and saved my a$$ about a week ago because I was behind a dump truck and his brake lights didnt work. I didnt realize he was coming to a complete stop until vorad started screaming at me. I seriously think I would have plowed into him if it werent for vorad. But his tail-lights never came on, no blinker, nothing.

I never really noticed any glitches with Vorad either, it might have had a couple here and there, but for the most part it worked really well. You still have to drive the truck, but it is a very useful tool. As Fozzy said, it could be extremely valuable in conditions like fog where you will have limited visibility. I think most people would be surprised to find that in their normal driving patterns, they are actually following too close.

Now, one that had a few glitches and could get annoying at times is the "Iterus Lane Departure System". Nothing better than going through a construction area where the lanes have been moved around and it constantly rapping in your ear. Even still, you deal with the glitches as you now know that if you ever actually fell asleep at the wheel, that little booger would most likely wake you as you started to crossover into another lane...