I use Black powder for My pre-workout Supp. Some days my arms feel like they are going to explode and others not much feeling after a hard workout. I can say as far as giving you a kick in the ass this stuff is good. But I love the feeling of my arms about to ripe through my skin after I workout. My question is, is there a supp. out there that will give me the kick to get going in the gym and that monster pumps feeling during and after a good workout? As I am sure everybody here is, I am looking for cost effective also. More bang for my buck if you know what I mean.