Chris Stephens wrote a review of NiteRider Lumina 350 Light on September 10, 2013
Familiarity: I've put it through the wringer
The fact that this light puts out 350 lumens, charges on usb and doesn't need a separate battery is pretty sweet. This makes it perfect for throwing on your bike when popping out on errands and can't leave $100 of light sitting outside (aka: bar trips) but you still don't want to get mowed down by cars. I just pop the whole unit off and throw it in my pocket, then toss it back on when it's time to ride.
My only complaint is that there is enough play in the mount that when riding on pretty bumpy roads the beam doesn't stick in one place. But couple this with a decent helmet mounted light and this doesn't really matter much.