I ordered two of these nifty looking little lights. However, one was bad out of the box. The working unit is handy and provides decent light. Though I'm not sure if it's as bright as advertised. But on the plus side it does work reasonably well, changes modes, retains it's memory settings and fits into the pocket very nicely.
A definite downside IMO is the USB charging plug. I've never seen USB chargers fully recharge batteries, like drop-in chargers do. So, for me the jury is out, since I don't have a 10900 drop-in charger to test my theory.
Finally, the return process is not as customer friendly as it should be. The RMA didn't have a QR code or return label. So, I had to hand write a label, and pay for return shipping out of my own pocket. I could maybe understand that, if the light was an open box or discontinued item. But as I recall, this light was sold as an introductory deal. Moving forward, I'll think twice about ordering from Battery Junction for my next light.