I use it daily, I'm not sure if it really does anything for most people when it comes to weight loss. I've been losing inches at 3 times the normal rate, so you can't go by my numbers all the time.
What I did find is that it helped me adjust to a major caffiene cutback with not all the massive withdrawl sypmtoms. Like Cassi said, you don't really know until you give it a try for a few weeks.