While I cannot omment to greatly on strength gains(I am in the process of reavaluating my form on exerises, posturure,understanding of proper biomehcanics, something I feel is important to do every 6 months, )I can say that within a week and half The size and hardening effets are noticable(very much so.) My absolute favorite thing about this stack is the inrease in agression, it is very apparent. Not in a sense a violence, but a sene of better confidence in the outside world, and better intensity and fous in the gym, nothing I have taken has ever matched this. I am an overly passive person and to me this effect is welcomed. I love this stack, I would not reomend this combo to a begginner, not due to sides simply, it is strong and one needs to know what to expect(one at a time would be quite adequate)