This is a great supplement that has quality ingredients in it that work.

This is a great supplement that has quality ingredients in it that work.  Read Less

The additional amino acids and minerals mixed with the natural caffeine combine to make this a well-buffered source of energy.

The additional amino acids and minerals mixed with the natural caffeine combine to make this a well-buffered source of energy.  Read Less

On my off days, i tried various caffeine only pills and most times i ended up sitting on my couch under a blanket waiting for t...  Read More

On my off days, i tried various caffeine only pills and most times i ended up sitting on my couch under a blanket waiting for the very discomfiting feeling they all caused to dissipate.  Read Less

With my being sensitive to caffeine and it's half-life being at 6 hours, i did not sleep well last night.

With my being sensitive to caffeine and it's half-life being at 6 hours, i did not sleep well last night.  Read Less

Great mix of ingredients and not too pricey

Great mix of ingredients and not too pricey  Read Less

It's a fair price for a quality product with no unpleasant side effects.

It's a fair price for a quality product with no unpleasant side effects.  Read Less

But the stuff is the real deal and i really like how it made me feel.

But the stuff is the real deal and i really like how it made me feel.  Read Less

(i write books all day with a collaborator over skype and he always knows when i've taken a regular caffeine pill -- this, he's...  Read More

(i write books all day with a collaborator over skype and he always knows when i've taken a regular caffeine pill -- this, he's unaware of unless i tell him.  Read Less