I have had one of the Dorcy 1 watt headlamps for a couple of months now. I bought it to help me do some work in an old warehouse that had the lights removed from the majority of the rooms, and it worked so well that I did not need to use my Craftsman 19.2v flourescent worklight. It works great, and I would recommend it. It is nice and bright, well worth the 20 bucks. Another plus is that it uses standard size batteries.
The downside, which I noticed today, is that the LED is direct wired, not regulated or anything, so it will get dim as the battery life diminishes, but of course, the light will still be white.