Never heard of it, but a quick google tells me it's just another get thin quick pill. They don't tell you everything that's in it, and only one ingredient listed is actually fiber. Google is filled with page after page of paid testimonial type sites.
Supplements like this don't work. If they did, we'd all be taking them.
This particular one is another of those "sign up for 'free' and we'll hook you into an expensive autoship program" scams. If they were legit, they wouldn't need to have to scam people through their credit cards. www.dietpillcritic.com/diet-pills/skinny-f
Skip the supplements, and stick with what works.