I have been using the one I have for about a year, and it's like having an extra headlight in your hand except for the size. Slightly large for the pocket, but not too large to carry with you. Mrs. Joe keeps one in her vehicle, too. It also has a strobe function. 2 CR-123A Lithium batteries, and mine has functioned well in all sorts of weather, from -30F to 104 above.
You don't want to look into it.
That is an awesome light. I confess, however, that the first two things I look at is the price and the type of batteries. The price (for what you get) is reasonable. However, for me it is critical that the light either be rechargable or use standard batteries. Preferably AA’s.