I looked at that website. Just looking at their site...I don't trust a single item they sell. VERY shady looking.
the supps they're selling, like Clenbuterol, have not been researched as fat burners. Clenbuterol is actually a bronchodilator...great for asthma...but as fat loss its not proven.
Incidentally, the best time to take a proven fat burning product, is near the end of your slimming down process. in other words, those last stubborn 10 lbs...that's when you might consider something good.
but not that website...no way.