I used it for a few months once. I dropped 9kg but I was exercising much more and eating much less, I don't think any of the weight loss could be directly attributed to the green coffee at all. I did find it suppressed my appetite though. However there were 2 side effects which would make me not want to use it again - the first and worst, it gave me cavities. After 3 months of using it I had to get 3 fillings, I don't think the timing was a coincidence (I go to the dentist every 6 months and was all clear 3 months before I started the green coffee). Secondly, this only happened a couple of times but still... There were instances where I was just soooooo thirsty no matter how much water I drank. The first time it happened I guzzled like 2.5L of water and was still incredibly uncomfortable from thirst, I didn't want to drink any more bc obviously something wasn't right. The second time wasn't as strong but yeah... There's some sort of chemical crap in this product, I think. I wouldn't use it again.