I remember roughly 5-6 years ago when just about everyone was saying I was full of shit for recommending SD over Anadrol the last few weeks of prep.
How things change.
My only concern for a lot of the guys who do use SD is...are they getting good SD? I hope so...because I've used way too many shit brands over the years to place my confidence in just anything. So, for the guys who don't have any experience with their current stash, I recommend trying it out long before the contest arrives...preferably in the off-season when everything is consistent and no changes are being made. This makes it easier to assess its effects. If it ends up doing what it is supposed to (it should provide a dry, hard, dense, full look with enhanced vascularity), save it for the show. If not, set it aside and look for another brand.
Of course, those guys who have plenty of experience with the drug could experiment with it part way into prep and still come to an accurate conclusion...but for those new to the drug, leave the experimentation for the off-season.