I like using my TK10
And would probably like the smooth throw on the TK11 too... versus "all the other tactical" lights on the market...
... due to the particular grip ring and tail cap switch styles.
I've not been able to use most other "tactical" lights with an auto pistol (45acp) during low/no light action range practice due to "the others" having a switch design that needs to be depressed with a thumb tip. Most of the other tail cap designs do not have enough button height to operate in a one hand being palmed for momentary on - as in being held in a two handed grip on a gun. The others, yes even the recent T1, as well as many many other designs have too much "defender ring" or tail guard metal surrounding the tail switch button. I'll add that the TK 10-11 does too, but at least it's tail guard is lower than most and so the button sticks up higher. You just can't candle stand with them, but I don't plan to use it that way.
I use my left hand holding the light cigar style between first and second fingers, holding snug against the base web of the fingers, and so now have the tail switch butted up against the meaty base of the thumb's muscle on the left hand. Held in snug this way makes for a secure flashlight grip.
Holding it this way i've been able to clench the light securely, make an easy aim for target aquire, and be able to add the use of the 2nd 3rd 4th fingers laying over my right hand's fingers, bracing them over and against my right hand's grip on my pistol. The light is held near to the left side of the gun, and the three fingers add support to the grip while firing multiple rounds.
My other pure tool use for shooting in a low light situ (until these TK10/11's came out) has been my incans, my older SF Z3 that grips the same as Z2, C2, C3 combat lights. For my style and control, TK10-11 and the SF combats lights have a tall enough switch to be able to palm the switch button for two handed gun grip, equaling better accuracy, and I'm not stuck only using a thumb tip to turn the lights on .
Fenix has the tactical design grip merits understood, finally :thumbsup: