Sust has been good to me, but I'm sticking with enanthate or test prop from now on. No need for all that multi-esther bullshit, mg for mg I think sust is far less effective. If you shoot 500 mgs a week, roughly 120 of it are wasted in the prop and phenylprop esthers because they're a) not shot often enough to be effective and b) not big enough doses to be effective. 30 mgs of prop ain't shit, even if its shot e.d. I think 500 mgs of enanthate has more kick to it than 750 mgs of sust. Just my opinion, sust may work well for others.