I have never tried it personally, but I have not heard good things about it making major differences. I am always a bit skeptical about any product that is not a 100% natural solution. I don't like the idea of adding chemicals that alter the body, regardless of the outcome. How many times have we heard about a product being pulled off the shelf because something they used in the product is now considered dangerous.
If you are looking for a natural solution, I would check out Bios Life Slim. It is an all natural fiber product that many people I know, myself included, have had great success with. Here is a link to get more info about it: