My buddy used CLA as part of his contest prep a couple of years ago.
He maintains that he really liked it, but he used it with other OTC supps, too.
Poliquin is big on the stuff.
Supposedly, it's most effective when used over 10-12 weeks at doses of 4+ grams/day.
Sesamin is supposed to be another good stim-free fat burner, although it hasn’t garnered quite the notoriety of CLA.
The two might work well together - I’m just speculating.
They could cancel each other out for all I know...