Ok so I tried my sample packet today. I took half a packet as directed on the package. Ten grams is a ton of powder so I mixed it with 32 ounces of water. Tastes great, but I forget what flavor it was. I mixed it in a blender, still some particles were found at the bottom of my cup but otherwise it mixed fine. About 5 minutes after I took it I felt great, had a nice boost in energy and mood. The bad thing is about 20 minutes later it was completely gone. So the effects only lasted me around 20 minutes. After that, nothing. Wish I could have taken the whole packet to see if that would have helped but I always assess tolerance with a new product, especially one that has stimulants in it. If only I had another packet....Then I could evaluate it better. Not sure if a whole packet would make it last longer though. It might be stronger but I'm not sure it would last any longer. If it lasted longer I would be getting some of this because I felt great. The only thing I don't like is the carbs. Sure it is only 3 but that is in a half packet. So 6 carbs in a full serving. I only eat 30 or less per day and they all add up. Anyway, thanks Neogenix for letting me try it out.