On my first cycle , and used prop. Just did my third inject yesterday and its already working. I do 100 mg eod. I am lean and ripped at 160. I have a pump for three days now and my chest already popped out. My wife even said something yesterday,then I used the hard-on I had for three days straight and banged the shit out of her . Shes loving it too. (she doesnt know though). I am almost forty and feel friggen great already. If its mostly mental or not, I see and feel a difference as of yesterday.They said prop takes ten days to feel. Mine kicked in sooner. Cant imagine after a few weeks. Good luck