I've been on it about 3 weeks, and I've lost about 10 lbs. It gives decent energy (especially at first), but its that wiry, amphet-like energy--pleasant for some (not really my thing). The literature says it can show up as an amphetamine (though not a METH amphetamine) on a UA, so show whomever your scrip beforehand. About the best thing I can say about it is that the nervous energy makes me feel the need to get up and exercise (love to lift, but the extra motivation is nice on cardio days). Pulse stays elevated constantly, so maybe that has a calorie burning effect. Sides for me: constant cotton-mouth and markedly decreased libido. All in all, I am looking forward to finishing my 8 week scrip due to the sides. But, I'm trying to go from around 20% BF to around 15% before my first test cycle next month. I can't make a solid recommendation as I have nothing to compare it to in my experience other than OTC's and caffeine. It does trump those, though.