One of my workout buddies used them a while back, he stacked some of their gear with our "normal" gear (we were short). He had good gains from his run, but that was no idicater of the product, but there were also no "negative" results.
In short he had 4-6 products with just 1 being from them, so you cant really make a determination based on that cycle.
Wish I could help you more, maybe someone else will "chime" in at some point.