OK let me say this.
I've run Dynamic Formulas SD and found it to be legit and potent, i ran it in to LGI SD and felt that the effects dropped. Now, this may or may not be a knock on LGI, as you will notice a drop in effects over time. I ran LGI SD again, and found that i simply didn't feel like it was as active as Dynamic's. Out of the recent batch of clones released, i''ve been the happiest with Dynamic Formula's SD.
As far as Hard Rock goes, i have a little stash of their orals, but never used. Stocked up on their M14ad and Hdrol, not SD. I have a few friends that have had good things to say about Hard Rock and them being legit. But i also hear of random bottles having different colored pills than the rest of the batch. I have not heard anything about someone running a cycle and claiming the bottle was bunk..
Hope that helped a bit.
Edit: I've actually been thinking of selling my LGI and buying Dynamic's SD. Even though Dynamic comes in 60 pill bottles where LGI and i think Hard Rock too comes in 90 pill bottles; i'd rather pay a bit more for something that seems more active.