I've tried them all...thought Lipo would be the best, considering how "cutting edge" and close to illegal it is...but I didn't get much out of it. Tried Hydroxycut a while ago, nothing. Went through a bottle of Xenadrine about a month ago and I was very happy. Started off the first few days taking two in the morning, two at noon. I got a flush feeling about 1/2 - hour after taking them, felt a little buzzed/high/euphoric all day, and definitely hot, but not unbearable. It crushed my appetite, too...I was keto dieting, eating 6x/day. After a few days, I started taking two when I got home from work, before workout (6:00), and I had some of the best workouts. As far as fat loss; and I should tell you that no supplements (legal or otherwise) really work well on me; I'd say in a month, plus the diet and workout, dropped maybe 2% bf. This is my personal experience...I think that supplements/drugs/diets/workouts work different for different people.