With daily use, regular wear and tear, and whoops moments that would have ended a lesser flashlight, it has NEVER failed to work.

In addition, the Streamlight "siblings" I have added to the family have likewise performed flawlessly and reliably. The Stinger & charger set purchased shortly after the subject here, to this day, impress me. Not only is this light consistent and reliable, additionally, the batteries still hold a charge as long as when new, despite being cycled hundreds, if not, over a thousand times! I always recommend Streamlight's products to everyone, and carry a Stinger HL on my person daily, an original stinger in my toolbox, a ProTac HL kept in an outdoors backpack, and a ProTac HL-X mounted to a long gun.

The little ProTac 2L purchased in 2013, having been used and worn so much, is no longer black, lacks the lens, and yet somehow still functions reliably. It blows my mind! I don't know of any other brands that would've fared as well. I doubt even Surefire, known for their ruggedness, would've come out still functional having been through as much as this little guy!