I just ordered a Fenix P3D, which uses the same LED with a different body and circuitry. So far I'm impressed with the quality, and the combination of brightness and long runtimes is great, and ideal for surival use. I also really like that the light and several sets of spare batteries are very light. For years I really wanted a Sure-fire, but I realized with Fenix you get an even better light for a fraction of the price.

FYI, you can get CR123 batteries for $1 each at batteryjunction.com . Plus you can order them in pairs(or triples) shrink wraped as a stack, to make organization and reloading quicker.