This is one of VPX's newer products so there is not much feedback outside of testing at VPX. One of the benefits of the 4-hydroxylation is that there should not be any progestational effects. It should also improve the hormones anabolic to androgenic ratio. All in all this product will not puch much size on you, but would stack well with 4-ad or 1,4ad. Maybe 5aa on a cutting cycle.