From what I can tell this stuff really works. I came off a cycle of prohormones (epi and super) and bought this because it was the only supp in GNC to actually have DAA in it. All of the other "Netty Test Boosters" sold there are mainly tribulus based which is worthless crap in itself. This stuff also has a super high quality flax lignon? extract which acts as a phyto-estrogen. This is a good thing because it will compete with your body's natural estrogen at the receptors, essentially inhibiting aromatase.. So anyways, I started taking day 1 of PCT along with beginning 3 weeks of tamox. After tamox was run, I kept taking this stuff and can honestly say I've felt a huge test boost starting around weeks 3-4. The drawback is that I am seriously starving all the time. I will wake up in the night to eat... another has been acne on my back.. I didn't even get acne from the PH's which is weird.. Well it says to take for 6 weeks tops so I bought another bottle and will only do 2 more weeks and take a break, but I can say my lifts are still gaining, vascularity is good and sex drive is great. A little body fat has come from the appetite problem but I will work on shedding after I finish this stuff..