fan######ingtastic, i have one as i light on my bike, set me back $400 with the baterypack and all but i have been flashed by cars many a time, they seem to think i have my high beams on i was so impressed i bought a torch too, but i went for the cheap $99 special....it lasted a month.
but yeah highly recomended it makes the streets light up like the middle of the day-a mate has one too and on a good night with not much trafic on the road we can see each other comeing when we leave our houses to meet up for a ride at night and we live 4km away from each other!