I have tried a few other fat burners, but this is the only one that doesnt make me sick and jittery. I started out taking one after breakfast and one after lunch, for about two weeks, then began taking two after breakfast and two after lunch. When i first upped the dose, i got a little jittery in the afternoons, but not bad enough to make me stop taking it. From the first day, I could feel the lift in my metabolism, and i have dropped 11 lbs in a month. I eat pretty normally, with a little junk food now and again, but i work out for at least 2 hrs a day. The first 4 lbs i dropped in 3 days, but i believe this was all water weight, these pills will make you pee! Also, you will feel more thirsty, so drink plenty of water. I average about 6 liters of water a day, unless I am outside more, then it will be 7 liters. All in all this product has been good for my weightloss, and my increased metabolism. It has somewhat suppressed my appetite, but I didnt have too much of a problem with that. A very unexpected (but appreciated) side affect, after about 2 weeks of taking these, i realized i was not smoking as much as i used to. I no longer feel the "need" to smoke very often, and went from a pack a day to an almost non-existent habit in the space of two weeks, with none of the torture smokers usually feel when quitting. I dont know if anyone else has experienced this, but it has been pretty outstandinf for me! Give it a try! Everyone will react differently, and no ones review on line will be able to tell you how it will affect you individually.