I got one of these last week and have to confess it has opened up my night riding quite significantly, in that i can now see down stuff where my bar light would be picking out something in the far distance but not down the drop immediately in front of me!
The unit helmet light is light and sensibly attached to a very near bracket, the battery pack is litium polymer and has a long enough lead to go into my jersey pocket. with enough power to kick out light equivalent to a Maxx D for about 3.5 hours.
The head unit does get quite hot but downpowers to cool down if it is going to overheat.
Nice beam, well made, complete package and working well so far. Does anyone else have one? What are your impressions?