yeh, you're gonna want to run the s1+. The only side I had was slight testicular atrophy, and they rebounded within a week and half of PCT. I would also recommend skipping 6oxo and doing nolva for PCT; it's around the same price and so much better/safer (especially to have on hand) it's crazy not to use it.
s1+ will seriously surprise you with the gains you'll make. it just doesn't get the attention m1t does.