Been tempted to use in the past, but never did. Always made good gains in size and strength without them and I never had a desire to compete. Plus, I enjoy being bigger and stronger than the most juicers in the gyms I train at.....makes me laugh cause I don't use. I'll never be a superfreak in terms of size, but I just don't care. Plus, my family wouldn't at all support my decision to use....I respect their opinions above all others.