The only thing I do not like about those LED's is the color. It's too blue. My high end flashlights have a warm tint or white tint. Then you have you cheap crappy flashlights from the hardware store that have the blue tint.
Isn't the blue tint added intentionally to LED's? I have a few LED flashlights and a couple of bulbs that put out nice white light without the pimp-tint.