I tried this product back in 2007 when it first came out. The old saying: 'You get what you pay for.", says it all with these pills. I had no weight loss results. In fact my appetite didn't change either. Basically what this product is, is caffeine in higher than typical dosages. Caffeine works as an appetite suppressant, but in my experience that was very minimal. I'm not sure how safe this product is, given the amount of caffeine in it, but I would highly suggest trying another product, instead of wasting your hard earned money on this. Effectiveness I used it as prescribed on the label for about 3 months. I lost no weight, and my appetite stayed the same throughout. If I could have ranked this as a 0, I would have. Side Effects I didn't have too many side effects. The most notable negative side effects were slight headaches, and fatigue when the pills started to wear off. After I stopped using the product I had a couple of days when I crashed hard and felt like I had no energy all day.