I ran a fill of it close to 20 years ago in a Torqueflite 727, 60s vintage. I doubt the Trick Shift from back then is the same as today's, but it did firm the shifts a bit. I went back to Dexron and put in a shift kit and things got even better, though.
I wouldn't run it in anything with a torque convertor lockup clutch. The main clutch packs and bands are made to engage quickly anyway, but the convertor clutch is modulated and deliberately slipped in many transmissions. You NEED friction modifiers for that, and in fact you often need more than Dexron provides, which is why Chrysler uses ATF+4, Honda uses their special fluid, Hyundai uses another, etc. etc. Its *mostly* for the TC lockup clutch.
So if you've got an old 3-speed or 2-speed without lockup in a muscle car, dragster, or hot rod, then Trick Shift might be great. Anything else- I wouldn't try it.