Andy Mentionwrote a review of Lezyne Micro Drive Front Light on December 12, 2012
Familiarity: I've put it through the wringer
This light is plenty bright to get you in trouble with cyclists going the other direction. The battery doesn't last forever though so you'll want to charge it regularly. Luckily the on/off switch quickly tells you how much juice you have.
My only real complaint is cold-weather battery life. My speculation is that the aluminium case conducts heat so well that the battery just gets cold and dies.