This fat burner gives me very good smooth long lasting energy. One serving has 225 mg of caffeine, usually this amount kicks me to the roof so i would expect stronger energy kick at this amount of caffeine but energy kick is moderate. Energy boost is really long lasting and smooth and it is good for longer workout or cardio which is what I normally tend to do. I run from 1:30 to 2 hours and energy is still there and I don't feel much appetite suppression but sweat more. Mood enhancement is decent and price is very good value for money considering its 60 servings.