It's the best all-around useful, mostly reliable light you can buy for a reasonable price. The generator light won't work while you're stopped, so supplement it with at least 2 flashing lights like VistaLites, a red one facing backwards and a yellow-green one facing forward. They also make you visible after sundown but before it's dark enough for bike lights to make much difference. The Taskmaster is not bright enough or focussed enough to do this well, but it's better than nothing and it's cheap and is as reliable or more reliable than any of the other head-mounted lights I've tried. The Buddy Belt makes you quite noticeable from almost any direction.
Flashlights are simple.
If you can't get one to work reliably, it's probably the manufacturer's fault, not yours. Be aggressive about returning unreliable merchandise. And when you find something that's good, let your friends and fellow cyclists know about it. All Rights reserved.