Meaning that the test prop is not as hard on the system. YOu can take very small doses and see results unlike cypionate, and suspension. I've used them all and prop just seem to me less of a problem for me. Cypionate, well you can take a shiit load of the stuff before you see any real results, I've heard guys taking 800-1000mg with no side affects and only gaining a few lbs of muscle mass, at which time you lose 90% of that LOL