The first thing you might wanna do, for those of you/us who bought these is find a small rubber "O" ring about the diameter of the AA battery and throw it into the body of the light before the battery goes in (the battery goes in + side down). Otherwise the battery will rattle around like crazy when the unit is in the "off" position.
Other than that easily fixed rattle problem, the light is pretty good for the $$. Also the body of the unit appears to be painted? as opposed to anodized which isn't a big deal although it muddies the knurling on the body a bit.