How do you like that one? I just bought one, but I plan it to be my only rear light. I've been using nothing but my standard reflector and some reflective tape until now, but after getting off the bike and looking at it from the rear with my flashlight I decided I should get a light after all. I like that the 500 is a reflector, too = simpler than having two pieces of equipment. I started a thread in the Electronics forums but nobody's replied so far.