tacreamer;

No problems so far operationally. I do not like the fact that the Dynolight has part of the electronics outside the light in a bulb shaped housing hung on the external wiring. It reminds me of an Elizabethan traitor with his guts hanging out. With the cold weather in Reno I have not gotten to any really dark roads at night to get a really good impression of the light output but it seems good in town so far as I can judge.

Aesthetically I like the Supernova housing better if that is a consideration for you. I also prefer the Supernova handlebar mount better than the O ring handlebar mount that the Dynolight uses, enough so that I made my own mounting plate to use a Cygolite handlebar mount.