I am constantly on construction sites for work. Whenever the contractors really, really, really, need to see something in a vault, pipe, or extremely dark area, they come and borrow the Felix in my belt. I will just say, most of them would rather ask the devil for a favor then ask me for one.
I can see kitty tracks on a hillside from over a hundred yards in the snow with it, couldn't do that with my old 4 D cell Mag lite that weighed 20x as much as this one. I am sure there are better ones out there, and I will eventually find it, but until then I gotta recomend the Fenix.
Now if they just made a headlamp that worked as well, then I wouldn't get frozen fingers. That would be really nice.