Just finished my first container...1st dose was insane. More like Plasma Jet than anything else. Taste was a little bitter, but you get over that. Tremendous energy in the gym. Half way through had to bump it up to two scoops to get that effect. Gave me a rushed Sensation like Plasma Jet does. Increased my overall strength during workouts by 20%. Way better than Jack3d. Did notice some flushing in the face and forearms, but expected that. Did find I stay "caffeinated" about an hour after the gym, but that died down about two days later (tolerance). No jitters though. Bought a second can to try different flavor. Definitely a must for hard core lifters. Best price out there. New personal bests in all 3 lifts (dead, squat, bench). Does irritate stomach in the beginning. Insane energy and strength though.