I find they are quite nice to work with, I have a few I picked up a on group buy that are identical to the DX stars. In the case of my DealExtreme ELLY lights, and probably a few of the other Dealextreme 1 Watt LED flashlights that use those same brand-x LEDs (as opposed to Luxeon), the focus works for the Cree out of the box, so for $5.50 + $6.75 + 2 solder joints you have a nice 1W light with fairly bright that works on AA batteries. Unfortunately the Alkalines won't draw much more current than that, so to get more brighter in an Elly, I'm considering pulling the circuits out of one of them and installing a LiIon 14500 direct-drive (with a resistance that will bring current down to about 750mA -- extra resistance is more important with lithium batteries as they don't have much internal resistance like alkalines).