The FT is definitely the pocket-carry champ. And it works like a dream. Unfortunately, I don't carry lights in my pocket, and perfer the tab to anything else - so I mostly use the standard tail. But if I DO need to toss a light in my pocket, the FT is the answer.
The only draw-back with the FT for me (besides losing the 1/4-20 hole and the tab mount - doesn't have to be like that, does it Don? /ubbthreads/images/graemlins/smile.gif) is that the membrane on mine pooches out just a bit to make tail standing NOT rock-steady as with the guarded switches. I'll likely take just a bit more metal off the nubbin to fix that... or compress the spring a bit. For shear size/switching function, the FT can't be beat.