I was ranting about how Lipo 6 Black was freaking amazing like two weeks ago, but my body was literally falling apart because of it. I took it back to GNC and bought USPLabs' Recreate, which is a "healthy" caffeine pill, i.e. less caffeine and more natural ingredients. I still get a pretty intense power boost, but with no shakes or GIGANTIC crashes that I had with Lipo 6 Black. (I slept for +16 hours the two days after I stopped taking Lipo 6 Black.)
GNC has a "no questions asked" return policy so you if you're up for it, try out USPLabs' Recreate. This is the fourth or fifth day I've been taking it and I've already lost three pounds in body fat, not water weight or muscle. (The losing weight bit could come from Lipo 6 Black's effects, but I've been taking Recreate since and have been seeing these numbers)
If your intention is to bulk up your weight, don't take them. They're caffeine pills, which means the main intention is to lose weight. By doing that, they give you large amounts of energy and suppress your appetite.
On a scale of 1-10, I'd rate Lipo 6 Black a 4.
On a scale of 1-10, I'd rate Recreate a 7 or 8.
Oh, also. I used to take TwinLab's Whey Protein, 'till I ran out. Now, occasionally, I'm taking Ultimate Nutrition's Protein Isolate (which tastes horrible) Protein Isolate's function is to also help body fat disappear, as opposed to regular Protein which just focuses in helping muscles recover.
As you can see, I'm trying to shed a few pounds while staying toned.