I have taken this product on and off for about 6 months, more on than off. It does actually work if you exercise and curb your eating of course. This is not a miracle pill, when I only exercised and utilized weight watchers the pounds coming off were extremely sluggish. With the metabolizer, it helped me to stick to my points system, have greater endurance during routine workouts and it gave me crazy energy without the harsh crash that you experience with other products. The only reason why I ever go off is because I think I love it to much and I don't want to ever be dependent upon it. The benefits of the added energy boost alone is enough to make me want to take it everyday. Great Product!