Well the most fskd up thing about the flashlight is that it's off centre most of the time. You think oh cool, I'll just shoot to the centre of the light...nope..doesn't work that way. And the flash is just WAY too big. I've used it a couple of times and I always wondered why noone shoots at me. It's because it's totally ridiculously blinding. I also don't really use it because it's a dead give away when you're trying to make a stealth infiltration
I also use the taclight M9, but I usually turn the flashlight off because it annoys my teamies when that big ol' floodlight is shining in their eyes.