It's good stuff, & it should last at least 1-2 years. Take 3 caps, 3 times a day in divided doses (9 total) per bottle recommendation. It won't keep you up at night like ECA, so spread it out evenly. It will last 2 weeks, you can expect lose 5-10lbs if diet is in check. Take milk thistle or ALA with it for liver protection & do not drink alcohol while on it.
Do a search for UCP-1 or Usnic Acid & you'll find lots of info on how to diet with it, what to expect, etc.