Yo I've been using SARMs for a while now and I even used their S4...been off of the S4 for a while and I recently got my eyes check and it they were healthy.
Osta is freaking amazing, s4 fat loss and vascularity was like being on 75mg-120mg of helladrol, and fat loss and energy on GW is out of this world. All legit stuff and if you look at their site you can see that they have MRI readings of them.