When I first did my research on Zantrex-3, I was worried about it from all the bad feedback it was getting. Having never done this before, and to have all my family relations (some of which were doctors) advise against it, I was really worried about the side effects... regardless I went ahead with it anyway. So far I've gone through half a bottle following the recommended dosage and I must admit I do have increased energy. I've lost 4 kg so far, but being halfway through the bottle I did expect greater results. I am happy to say, however, that I haven't experienced any of the side effects mentioned by other users of Zantrex-3. Only once when I didn't take it with food did I get a feeling of nausea, which is common with any strong medication. Overall, an "ok" rating. I probably won't take anymore after this bottle however.