basically S-roid is an S-drol clone, its the most powerful prohormone out on the market right now. Being the most powerful isn't always the best as it's the most toxic and comes with the most sides. That being said it's basically a very low level oral steroid.
This isn't something you can just run and be done with it you'll need a full PCT. A PCT is test booster, estrogen blocker, milk thistle (standardized extract) for your liver. These are the very basics you'll need.
I also wouldn't run it longer than 3 weeks you'll get most of your gains by then and the 4th week will just shut you down.
One more thing I don't know your exp with PH supplements so be prepared to have testicular shrinkage and low sex drive for a week or two. I tell you this cause I flipped when I first had shrinkage and side effects.