200 lbs @ about 10% BF. I took all 3 caps and just didn't notice a thing.
My husband is a little heavier, perhaps a little fatter, and he said the same thing after taking three of them. He only took them once, though, because we heard that they make you feel euphoric. He didn't feel them at all.
Not sure about the effectiveness as a fat burner, but my girlfried is somewhere around my size, about 125 pounds, and she was high as a kite off two of them.