Got my samples a few weeks ago but finally got a chance to try it. The first time I tried it didn't feel a whole lot but was recovering from the flu so it might have had some effect. I took it again a few days later and a totally differetnt. Hit me right as I walked in to the gym. I felt like I could lift a car and had one of my best workouts. Felt pupmed the whole time and had energy even when I was done the workout. Great product. If you have more free samples please send my way.