Just thought that I would drop in on this one quickly. Although I wasn't able to order any samples (international shipping IS really expensive), I did try the samples that AX included when they shipped me Mass FX for my upcoming Mass FX/X-Factor testing log. I have to say, holy sh*t! IMHO Stimulant X is on par with almost every ECA stack I've tried. I usually dont' respond really strongly to stim products but these were totally different. I can definitely forsee them becoming a major part of my cut. Plus they're cheaper than the ECA pills that I bought not too long ago!!