I did herbalife for awhile. Makes you lose weight fast but I had to drop out because it's too expensive. Between weight loss supplements, protein shakes etc it costs like 100 bucks a month. And as with any diet supplement, you gain the weight back if your not careful.
I wouldn't say it gives you more energy though. It curbs your appetite. Actually, while I was on it I now recall taking many more naps than I do now. Could be a reaction to meds I was taking then but I do remember needing to sleep more often back then.