I've got this duet light, almost the same as I've got the 4AA rechargeable version. Pretty satisfied, got it cheap. And you can replace the stock battery-pack with one with better cells. The ones that come with the light are 1200mAh.
Some beam issues, but of little practical importance. Battery indicator is handy and the nichas will work for a while after the Luxeon shuts down on low batteries.
I think a Favourlight version of this non-recharable light is reviewed on flashlightreviews.com. Same light different name.