Check out ECA stack:
http://en.wikipedia.org/wiki/ECA_stack - it's essentially the same thing. You can buy the ingredients separately and save money. Also, ECA is better. Xenadrine doesn't contain ephedrine anymore. Using the ECA stack will get you cut up and get you to lose water weight quickly. Just keep away from high sodium containing foods and watch your carb intake - breads and pasta especially.
Don't believe the hype when it comes to this Ephedrine (which is the only reason why Xenadrine was considered 'bad'). Alcohol kills more people in a day than Ephedrine has since it's introduction to the supplement industry.
Oh, and there is a magic pill - it's called T3. It's a thyroid hormone:
http://en.wikipedia.org/wiki/Thyroid_hormone. You'll die instantly when you take it -- or so the media says, lol. It's a great way to burn fat and lose water weight. It decreases any bloated look you get from eating too much sodium and carbs. T3 is the hormone that is in a nutshell your metabolism. When someone is thin and says they have a high metabolism, then there body natually produces more T3 than average.
Anyway - keep in mind none of this is a substitute for a well balanced diet, but it can be ;)
Eric