I have tried Lipovox, Xenedrine, Ripped Fuel 5X, and Lipo 6 (in that order), and think Ripped Fuel is the best of the bunch. Being all natural, as well as having having a high B12 content. I certainly noticed more energy, as well as a little fat loss and muscle gain. The biggest benefit is by far the B12, which actually MAKES you want to excercise more! Ripped Fuel 5X is a good product, especially for the price.
I have used several supplements while trying to lose weight. I believe Ripped Fuel 5X is a good supplement, allowing me to be hungry less often while offering a lot of energy to boot. I have noticed a small amount of weight loss since first taking it one week ago.