I have been using Advanced Amino for one year now. I rate the product as outstanding. I take 10 tablets every day, in doses of three, three and four, religiously. It took a while for the effects to be noticeably discernible, but that's appropriate with muscle growth and well-being improvements. Anything that works too quickly is just a stimulant and its effects will soon fade. Together with good quality and consistent weight training, and a good diet, I have added approximately 3 kgms of muscle weight, and my strength and fitness have improved proportionately.