When I've had money to burn I've bought good accessories. When money is tight I buy cheaper stuff. I'm still here to write about it. My main commuter has Planet Bike Eco rack and my LBS guy threw in the mount for a Superflash for free. I like the Superflash... it has the best of both worlds. It never goes completely dark between flashes, so it provides drivers with valuable information as to my heading, rate of speed and ETA... like I really believe that... honestly, I do not think that a vehicle closing in on my six at 45 mph really will care if I am going 12mph or 15mph... ... either speed is essentially stationary from his/her POV! I have, however seen flashers that have such a lazy blink rate that the bike and rider are blacked out completely for an entire second between light pulses... that's much too slow IMO. I will happily entrust my life to my $11 Viewpoint flasher. My only beef is that it has 72 different blink patterns and it takes me 5 minutes to cycle through them all to get to OFF, after I get home. The PB is either steady or blinking and that's it. Less really can be more. YMMV.

H