even with the most perfect of genetics, you're not gonna gain 15 SOLID, SUSTAINABLE muscles in a period of 18-weeks....the body's just not capable of it... so guys, stop fooling yourselves in thinking that gaining 15, 20, 30lbs by the end of a cycle is good thing... me, I am perfectly happy gaining 5-10 pounds per cycle because I know it's solid and I will keep it.