The ephedra free products are all pretty much the same, and IMHO pretty much just as useless as the next.
The "secret" to losing fat is eating right. There's just no other way to keep fat off, or to drop those extra 2 or 3 pounds so you can visibly see the six pack you've worked so hard to develop, etc etc. If you look at any of the serious bodybuilding types, going on a diet is a huge part of competition prep, because it gets them down to minimal body fat so all the muscles can be seen clearly.
Okay, gettin off on a tangent, this isn't about bodybuilding. IMO, just make sure you eat right. No sh*t food, no fast food, no soda, blah blah. As far as eating, being in good shape SUCKS!