Annoying as hell----not widely enough used to be understood by motorists, or even cyclists----maybe not the best idea for folks who do not like to draw attention to themselves---very non-traditional...............NEVERTHELESS, extremely effective in turning you from invisable to visible. WHAT IT IS: THE HEADLIGHT MODULATOR. Gotta go that route. Just from my own experience, based on my own reaction to seeing one there is no question in my mind that they WORK. Your eyes are involentarily drawn to a modulating headlight no matter how far away. A cursury scan of the distant horizon and your eyes will lock on a modulating headlight immediately. Thats enough for me. As they become more common accidents and injurys involving motorcycles are going to come down. Period. I know though, they remain a polarizing topic. Would welcome comments and opinions. Lets see what others have to say.