i got 4 free sample pills from a gnc in cleveland (guess the gnc was a franchise?) anyway, the dude there said something about being pretty strong. I took it in conjunction with arsenal-x. I don't think it was a good idea, I felt really strange. But my workout was phenominal. But, i'm not looking to increase my mass whatsoever. Just looking to increase my strength, lower my weight and become more vascular. I really want to get rid of the arsenal-x because it's just a run of the mill stim. (yohimbe, theobromine, caffeine anhydrous) and now that I found out that the 17-halo-methyl-diandrone is very very similar to regular androgen and is extremely anabolic, i'm not going to use it anymore. so i mean, if you're looking to increase your lean muscle mass then using the 17 halo would most likely be the way to go. just don't use it in conjunction with a stim. I'm not authority on this, but I'm pretty sure it'd be really bad for your heart.